diff --git a/README.md b/README.md
index 28c1cab..a0bb7d6 100644
--- a/README.md
+++ b/README.md
@@ -130,8 +130,8 @@ RF --> RTP
   - Mapeo de puertos
   - Mapeo de volumenes
 - Correr todos los comandos a travez de Docker Compose  
-ej. `docker-compose run --rm app sh -c "python manage.py collectstatic"`
-  - `docker-compose` Ejecuta un comando de Docker Compose
+ej. `docker compose run --rm app sh -c "python manage.py collectstatic"`
+  - `docker compose` Ejecuta un comando de Docker Compose
   - `run` comienza un contenedor específico definido en la configuración
   - `--rm` remueve el contenedor
   - `app` es el nombre del servicio/aplicación
@@ -150,7 +150,7 @@ docker build .
 - [docker-compose.yml](./docker-compose.yml)
 
 ```sh
-docker-compose build
+docker compose build
 ```
 
 ### Linting
@@ -158,25 +158,25 @@ docker-compose build
 - Instalar `flake8`
 - [requirements.dev.txt](./requirements.dev.txt)
 - Configuración [flake8](./app/.flake8)
-- Correr a travez de docker-compose `docker-compose run --rm app sh -c "flake8"`
+- Correr a travez de docker compose `docker compose run --rm app sh -c "flake8"`
 
 ### Testing
 
 - Django test suite
 - Configurar test por cada aplicación Django
-- Correr a travez de docker-compose `docker-compose run --rm app sh -c "python
+- Correr a travez de docker compose `docker compose run --rm app sh -c "python
 manage.py test"`
 
 ### Creación del proyecto Django
 
 ```sh
-docker-compose run -rm app sh -c "django-admin startproject app ."
+docker compose run -rm app sh -c "django-admin startproject app ."
 ```
 
 ### Iniciar el servidor
 
 ```sh
-docker-compose up
+docker compose up
 ```
 
 ### GitHub Actions
@@ -767,7 +767,7 @@ class Ingredient(models.Model):
 ### Creación de las migraciones
 
 - Asegura que la app esta activa en `settings.py`
-- Se utiliza el CLI de DJango `python manage.py makemigrations`
+- Se utiliza el CLI de Django `python manage.py makemigrations`
 - Aplicar migraciones `python manage.py makemigrations`
 - Correr despues de esperar por la base de datos
 
@@ -805,3 +805,507 @@ class Ingredient(models.Model):
         python manage.py test"
     ...
 ```
+
+## User Model
+
+### Autenticación Django
+
+- Sistema de autenticación *built-in*
+- Framework para características básicas
+  - Registro
+  - Login
+  - Autorización
+- Se integran con el panel de administración de Django
+
+### Django user model
+
+- Es la fundación del sistema de autenticación de Django
+- Django incorpora por defecto un modelo de usuario
+  - Utiliza un nombre de usuario en vez de un email
+  - No es facil de personalizar
+- Creación de modelo de usuario personalizado para nuevos proyectos
+  - Permite el uso de email en vz de nombre de usuario
+  - Asegura compatibilidad del proyecto con posibles cambios del modelo usuario
+  en versiones futuras
+
+### Creación del modelo
+
+- Basado en la clase `AbstractBaseUser` y `PermissionsMixin`
+- Creación de administrador personalizado
+- Se establece `AUTH_USER_MODEL` en `settings.py` para utlizar este modelo
+- Creación y ejecución de las migraciones
+
+### AbstractBaseUser
+
+- Proporciona las características de autenticación
+- No incluye campos
+
+### PermissionsMixin
+
+- Soporte para el sistema de permisos de Django
+- Incuye todos los campos y métodos necesarios
+
+### Problemas comunes
+
+- Correr migraciones antes de crear el modelo personalizado
+  - Crear el modelo personalizado primero
+- Tipeo
+- Indentación
+
+## User Model personalizado
+
+### Campos de usuario
+
+- email `EmailField`
+- name `CharField`
+- is_active `BooleanField`
+- is_staff `BooleanField`
+
+### User Model administrador
+
+- Usado para administar objetos
+- Lógica personalizada para crear objetos
+  - **Hash** passwords
+- Metodos para el CLI de Django
+  - Create superuser
+
+### BaseUserManager
+
+- Clase base para administrar usuarios
+- Métodos útliles de ayuda
+  - `normalize_email` para almacenar emails de forma consistente
+- Métodos a definir
+  - `create_user` llamado al crear usuarios
+  - `create_superuser` usado por el CLI para crear un super usuario (**admin**)
+
+### Agregando Unitetst para el modelo usuario personalizado
+
+[test_models.py](./app/core/tests/tests_models.py)
+
+```py
+from django.test import TestCase
+from django.contrib.auth import get_user_model
+
+class ModelTests(TestCase):
+
+    def test_create_user_with_email_sucessfull(self):
+        email = 'test@example.com'
+        password = 'testpass123'
+        user = get_user_model().objects.create_user(
+            email=email,
+            password=password,
+        )
+        self.assertEqual(user.email, email)
+        self.assertTrue(user.check_password(password))
+```
+
+### Agregar usuario personalizado al proyecto
+
+[models.py](./app/core/models.py)
+
+```py
+from django.db import models
+from django.contrib.auth.models import (
+    AbstractBaseUser,
+    BaseUserManager,
+    PermissionsMixin,
+)
+
+
+class UserManager(BaseUserManager):
+    """Manager for users."""
+
+    def create_user(self, email, password=None, **extra_fields):
+        """Create, save and return a new user."""
+        user = self.model(email=email, **extra_fields)
+        user.set_password(password)
+        user.save(using=self._db)
+
+        return user
+
+
+class User(AbstractBaseUser, PermissionsMixin):
+    """User in the system."""
+    email = models.EmailField(max_length=255, unique=True)
+    name = models.CharField(max_length=255)
+    is_active = models.BooleanField(default=True)
+    is_staff = models.BooleanField(default=False)
+    # Asignar el UserManager a esta clase User
+    objects = UserManager()
+
+    USERNAME_FIELD = 'email'
+```
+
+Actualizar `settings.py` para que Django utilize este modelo de autenticación
+agregando al final del archivo lo sgte.
+
+```py
+...
+
+AUTH_USER_MODEL = 'core.User'
+```
+
+Crear migraciones
+
+`docker compose run --rm app sh -c "python manage.py makemigrations"`
+
+```sh
+[+] Creating 1/0
+ ✔ Container recipes_api_django-db-1  Running  0.0s
+Migrations for 'core':
+  core/migrations/0001_initial.py
+    - Create model User
+```
+
+Codigo autogenerado [0001_initial.py](./app/core/migrations/0001_initial.py)
+para app `core`
+
+Aplicar migraciones
+
+`docker compose run --rm app sh -c "python manage.py wait_for_db &&
+python manage.py migrate"`
+
+```sh
+[+] Creating 1/0
+ ✔ Container recipes_api_django-db-1  Running  0.0s
+Waiting for database...
+Database available!
+Operations to perform:
+  Apply all migrations: admin, auth, contenttypes, core, sessions
+Running migrations:
+  Applying contenttypes.0001_initial... OK
+  Applying contenttypes.0002_remove_content_type_name... OK
+  Applying auth.0001_initial... OK
+  Applying auth.0002_alter_permission_name_max_length... OK
+  Applying auth.0003_alter_user_email_max_length... OK
+  Applying auth.0004_alter_user_username_opts... OK
+  Applying auth.0005_alter_user_last_login_null... OK
+  Applying auth.0006_require_contenttypes_0002... OK
+  Applying auth.0007_alter_validators_add_error_messages... OK
+  Applying auth.0008_alter_user_username_max_length... OK
+  Applying auth.0009_alter_user_last_name_max_length... OK
+  Applying auth.0010_alter_group_name_max_length... OK
+  Applying auth.0011_update_proxy_permissions... OK
+  Applying auth.0012_alter_user_first_name_max_length... OK
+  Applying core.0001_initial... OK
+  Applying admin.0001_initial... OK
+  Applying admin.0002_logentry_remove_auto_add... OK
+  Applying admin.0003_logentry_add_action_flag_choices... OK
+  Applying sessions.0001_initial... OK
+```
+
+En caso arrojar error por haber aplicado alguna migración previa se puede correr
+`docker rm <db_volume>`, si *"esta en uso"* primero correr `docker compose down`.
+
+Los nombres se pueden ver con `docker volume ls`
+
+Al correr los tests nuevamente `docker compose run --rm app sh -c "python
+manage.py test"`
+
+```sh
+[+] Creating 1/0
+ ✔ Container recipes_api_django-db-1  Running  0.0s
+Found 5 test(s).
+Creating test database for alias 'default'...
+System check identified no issues (0 silenced).
+...Waiting for database...
+Database unavailable, waiting 1 second...
+Database unavailable, waiting 1 second...
+Database unavailable, waiting 1 second...
+Database unavailable, waiting 1 second...
+Database unavailable, waiting 1 second...
+Database available!
+.Waiting for database...
+Database available!
+.
+----------------------------------------------------------------------
+Ran 5 tests in 0.675s
+
+OK
+Destroying test database for alias 'default'...
+```
+
+## Normalización de direcciones de email
+
+### Test normalize email addresses
+
+[test_models.py](./app/core/tests/test_models.py)
+
+```py
+    def test_new_user_email_normalized(self):
+        """Test email is normalized for new users."""
+        sample_emails = [
+            ['test1@EXAMPLE.com', 'test1@example.com'],
+            ['test2@Example.com', 'test2@example.com'],
+            ['TEST3@EXAMPLE.COM', 'TEST3@example.com'],
+            ['test4@example.COM', 'test4@example.com'],
+        ]
+        for email, expected in sample_emails:
+            user = get_user_model().objects.create_user(email, 'sample123')
+            self.assertEqual(user.email, expected)
+```
+
+
+Modificar el `ceate_user` de [app/core/models.py](./app/core/models.py)
+para utilizar el método `normalize_email` que provee la clase **BaseUserManager**
+
+```diff
+- user = self.model(email=email, **extra_fields)
++ user = self.model(email=self.normalize_email(email), **extra_fields)
+```
+
+## Requerir email
+
+### Test requerir email
+
+[test_models.py](./app/core/tests/test_models.py)
+
+```py
+    def test_new_user_withouth_email_raises_error(self):
+        """Test that creating a user withouth an email raises a ValueError."""
+        with self.assertRaises(ValueError):
+        get_user_model().objects.create_user('', 'test123')
+```
+
+Modificar el `ceate_user` de [app/core/models.py](./app/core/models.py)
+y levantar excepción `ValueError` si usuario no ingresa un email
+
+```py
+    def create_user(self, email, password=None, **extra_fields):
+        """Create, save and return a new user."""
+        if not email:
+            raise ValueError('User must have an email address.')
+        user = self.model(email=self.normalize_email(email), **extra_fields)
+        user.set_password(password)
+        user.save(using=self._db)
+```
+
+## Funcionalidad super usuario
+
+### Test creación de super usuario
+
+[test_models.py](./app/core/tests/test_models.py)
+
+```py
+    def test_create_superuser(self):
+        """Test creating a superuser."""
+        user = get_user_model().objects.create_superuser(
+            'test@example.com',
+            'test123',
+        )
+        self.assertTrue(user.is_superuser)
+        self.assertTrue(user.is_staff)
+```
+
+Creación del método `create_superuser` para la clase `UserManager` en
+[app/core/models.py](./app/core/models.py)
+
+
+```py
+    def create_superuser(self, email, password):
+        """Create and return a new superuser."""
+        user = self.create_user(email, password)
+        user.is_staff = True
+        user.is_superuser = True
+        user.save(using=self._db)
+                      
+        return user 
+```
+
+## Probando el modelo de usuario
+
+Correr `docker compose up` y en otra terminal
+`docker compose run --rm app sh -c "python manage.py createsuperuser"`
+
+```sh
+[+] Creating 1/0
+ ✔ Container recipes_api_django-db-1  Running   0.0s
+Email: admin@example.com
+Password: 
+Password (again): 
+Superuser created successfully
+```
+
+## Django Admin
+
+Es la interfáz gráfica para los modelos creados en el proyecto, permite
+la administración basica C.R.U.D.
+Requiere muy poco cóidgo para ser usado
+
+![img](./imgs_readme/django_admin_00.png)
+
+Se activa por modelo, en [`admin.py`](./app/core/admin.py)
+
+### Personalización del administrador
+
+Se crea una clase basada en `ModelAdmin` o `UserAdmin` donde se sobrescribe o
+establecen variables de clase
+
+ejemplo
+
+```py
+class UserAdmin(BaseUserAdmin):
+    """Define de admin pages for users."""
+    ordering = ['id']
+    list_display = ['emial', 'name']
+    fieldsets = (
+        (None, {'fields': ('email', 'password')}),
+    )
+    readonly_files = ['last_login']
+    add_fieldsets = (
+        (None, {
+            'classes': ('wide',),
+            'fields': (
+                'email',
+            ),
+        })
+    )
+```
+
+- `ordening` ![img](./imgs_readme/django_admin_01.png)
+- `list_display` ![img](./imgs_readme/django_admin_02.png)
+- `fieldsets` ![img](./imgs_readme/django_admin_03.png)
+- `readonly_fields` ![img](./imgs_readme/django_admin_04.png)
+- `add_fieldsets` ![img](./imgs_readme/django_admin_05.png)
+
+### Creando test para el administrador
+
+[`app/core/tests/test_models.py`](./app/core/tests/test_admin.py)
+
+```py
+class AdminSiteTests(TestCase):
+    """Tests for Django admin."""
+
+    def setUp(self):
+        """Create user and client."""
+        self.client = Client()
+        self.admin_user = get_user_model().objects.create_superuser(
+            email='admin@example.com',
+            password='testpass123',
+        )
+        self.client.force_login(self.admin_user)
+        self.user = get_user_model().objects.create_user(
+            email='user@example.com',
+            password='testpass123',
+            name='Test User'
+        )
+
+    def test_users_list(self):
+        """Test that users are listed on page."""
+        url = reverse('admin:core_user_changelist')
+        res = self.client.get(url)
+
+        self.assertContains(res, self.user.name)
+        self.assertContains(res, self.user.email)
+```
+
+- Django docs
+[reversing admin urls](https://docs.djangoproject.com/en/4.2/ref/contrib/admin/#reversing-admin-urls)
+- Django docs
+[testing tools](https://docs.djangoproject.com/en/4.2/topics/testing/tools/#overview-and-a-quick-example)
+
+Correr test `docker compose run --rm app sh -c "python manage.py test"`
+
+### Activar admin para core app
+
+En [`admin.py`](./app/core/admin.py)
+
+```py
+from django.contrib import admin
+from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
+from core import models
+
+class UserAdmin(BaseUserAdmin):
+    """Define the admin pages for users."""
+    ordering = ['id']
+    list_display = ['email', 'name']
+
+admin.site.register(models.User, UserAdmin)
+```
+
+- **Admin**
+  ![img](./imgs_readme/django_admin_06.png)
+- **CORE** Section
+  ![img](./imgs_readme/django_admin_07.png)
+- **CORE** Usuarios, requiere modificar pues espera campos que el modelo no tiene
+  ![img](./imgs_readme/django_admin_08.png)
+
+### Modificar admin para que use los campos de usuario personalizado
+
+```py
+from django.contrib import admin
+from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
+from django.utils.translation import gettext_lazy as _
+from core import models
+
+class UserAdmin(BaseUserAdmin):
+    """Define the admin pages for users."""
+    ordering = ['id']
+    list_display = ['email', 'name']
+    filedsets = (
+        (None, {'fields': ('email', 'password')}),
+        (
+            _('Permissions'),
+            {
+                'fields': (
+                    'is_active',
+                    'is_staff',
+                    'is_superuser',
+                )
+            }
+        ),
+        (_('Important dates', {'fields': ('last_login',)})),
+    )
+    readonly_fields = ['last_login']
+
+admin.site.register(models.User, UserAdmin)
+```
+
+- Administrador de usuario personalizado
+![img](./imgs_readme/django_admin_09.png)
+
+- Cambio de lenguaje y timezone, y traducción `gettext_lazy`
+![img](./imgs_readme/django_admin_10.png)
+
+- Requiere modificar pues espera campos que el modelo no tiene
+- ![img](./imgs_readme/django_admin_11.png)
+
+### Test página de creación de usuario
+
+```py
+    def test_create_user_page(self):
+        """Test the create user page works."""
+        url = reverse('admin:core_user_add')
+        res = self.client.get(url)
+
+        self.assertEqual(res.status_code, 200)
+```
+
+### Actualizar clase `UserAdmin` para que use los campos personalizados
+
+[app/core/admin.py](./app/core/admin.py)
+
+```py
+class UserAdmin(BaseUserAdmin):
+    ...
+    add_fieldsets = ( 
+        (None, {
+            'classes': ('wide',),
+            'fields': (
+                'email',
+                'password1',
+                'password2',
+                'name',
+                'is_active',
+                'is_staff',
+                'is_superuser',
+            )
+        }),
+    )
+    ...
+```
+
+- Los test pasan
+
+- Página para crear usuarios ![img](./imgs_readme/django_admin_12.png)
+- Panel de usuarios del administrador ![img](./imgs_readme/django_admin_13.png)
diff --git a/app/app/settings.py b/app/app/settings.py
index 43a7bec..11fd324 100644
--- a/app/app/settings.py
+++ b/app/app/settings.py
@@ -107,9 +107,9 @@ AUTH_PASSWORD_VALIDATORS = [
 # Internationalization
 # https://docs.djangoproject.com/en/4.2/topics/i18n/
 
-LANGUAGE_CODE = 'en-us'
+LANGUAGE_CODE = 'es-cl'
 
-TIME_ZONE = 'UTC'
+TIME_ZONE = 'America/Santiago'
 
 USE_I18N = True
 
@@ -125,3 +125,5 @@ STATIC_URL = 'static/'
 # https://docs.djangoproject.com/en/4.2/ref/settings/#default-auto-field
 
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+AUTH_USER_MODEL = 'core.User'
diff --git a/app/core/admin.py b/app/core/admin.py
index 6af52da..2729c07 100644
--- a/app/core/admin.py
+++ b/app/core/admin.py
@@ -1,3 +1,46 @@
-from django.contrib import admin  # noqa
+"""
+Django admin customization.
+"""
+from django.contrib import admin
+from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
+from django.utils.translation import gettext_lazy as _
 
-# Register your models here.
+from core import models
+
+
+class UserAdmin(BaseUserAdmin):
+    """Define the admin pages for users."""
+    ordering = ['id']
+    list_display = ['email', 'name']
+    fieldsets = (
+        (None, {'fields': ('email', 'password')}),
+        (
+            _('Permissions'),
+            {
+                'fields': (
+                    'is_active',
+                    'is_staff',
+                    'is_superuser',
+                )
+            }
+        ),
+        (_('Important dates'), {'fields': ('last_login',)}),
+    )
+    readonly_fields = ['last_login']
+    add_fieldsets = (
+        (None, {
+            'classes': ('wide',),
+            'fields': (
+                'email',
+                'password1',
+                'password2',
+                'name',
+                'is_active',
+                'is_staff',
+                'is_superuser',
+            )
+        }),
+    )
+
+
+admin.site.register(models.User, UserAdmin)
diff --git a/app/core/migrations/0001_initial.py b/app/core/migrations/0001_initial.py
new file mode 100644
index 0000000..75bfdbd
--- /dev/null
+++ b/app/core/migrations/0001_initial.py
@@ -0,0 +1,33 @@
+# Generated by Django 4.2.5 on 2023-10-06 15:46
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('auth', '0012_alter_user_first_name_max_length'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='User',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('password', models.CharField(max_length=128, verbose_name='password')),
+                ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
+                ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
+                ('email', models.EmailField(max_length=255, unique=True)),
+                ('name', models.CharField(max_length=255)),
+                ('is_active', models.BooleanField(default=True)),
+                ('is_staff', models.BooleanField(default=False)),
+                ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.group', verbose_name='groups')),
+                ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.permission', verbose_name='user permissions')),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]
diff --git a/app/core/models.py b/app/core/models.py
index 9d57c55..c814c00 100644
--- a/app/core/models.py
+++ b/app/core/models.py
@@ -1,3 +1,44 @@
-from django.db import models  # noqa
+"""
+Databse models.
+"""
+from django.db import models
+from django.contrib.auth.models import (
+    AbstractBaseUser,
+    BaseUserManager,
+    PermissionsMixin,
+)
 
-# Create your models here.
+
+class UserManager(BaseUserManager):
+    """Manager for users."""
+
+    def create_user(self, email, password=None, **extra_fields):
+        """Create, save and return a new user."""
+        if not email:
+            raise ValueError('User must have an email address.')
+        user = self.model(email=self.normalize_email(email), **extra_fields)
+        user.set_password(password)
+        user.save(using=self._db)
+
+        return user
+
+    def create_superuser(self, email, password):
+        """Create and return a new superuser."""
+        user = self.create_user(email, password)
+        user.is_staff = True
+        user.is_superuser = True
+        user.save(using=self._db)
+
+        return user
+
+
+class User(AbstractBaseUser, PermissionsMixin):
+    """User in the system."""
+    email = models.EmailField(max_length=255, unique=True)
+    name = models.CharField(max_length=255)
+    is_active = models.BooleanField(default=True)
+    is_staff = models.BooleanField(default=False)
+    # Asignar el UserManager a esta clase User
+    objects = UserManager()
+
+    USERNAME_FIELD = 'email'
diff --git a/app/core/tests/test_admin.py b/app/core/tests/test_admin.py
new file mode 100644
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+++ b/app/core/tests/test_admin.py
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+"""
+Tests for the Django admin modifications.
+"""
+from django.test import TestCase, Client
+from django.contrib.auth import get_user_model
+from django.urls import reverse
+
+
+class AdminSiteTests(TestCase):
+    """Tests for Django admin."""
+
+    def setUp(self):
+        """Create user and client."""
+        self.client = Client()
+        self.admin_user = get_user_model().objects.create_superuser(
+            email='admin@example.com',
+            password='testpass123',
+        )
+        self.client.force_login(self.admin_user)
+        self.user = get_user_model().objects.create_user(
+            email='user@example.com',
+            password='testpass123',
+            name='Test User'
+        )
+
+    def test_users_list(self):
+        """Test that users are listed on page."""
+        url = reverse('admin:core_user_changelist')
+        res = self.client.get(url)
+
+        self.assertContains(res, self.user.name)
+        self.assertContains(res, self.user.email)
+
+    def test_edit_user_page(self):
+        """Test the edit user page works."""
+        url = reverse('admin:core_user_change', args=[self.user.id])
+        res = self.client.get(url)
+
+        self.assertEqual(res.status_code, 200)
+
+    def test_create_user_page(self):
+        """Test the create user page works."""
+        url = reverse('admin:core_user_add')
+        res = self.client.get(url)
+
+        self.assertEqual(res.status_code, 200)
diff --git a/app/core/tests/test_models.py b/app/core/tests/test_models.py
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+++ b/app/core/tests/test_models.py
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+"""
+Test for models.
+"""
+from django.test import TestCase
+from django.contrib.auth import get_user, get_user_model
+
+
+class ModelTests(TestCase):
+    """Test models."""
+
+    def test_create_user_with_email_sucessfull(self):
+        """Test creating a user with an email is sucessfull."""
+        email = 'test@example.com'
+        password = 'testpass123'
+        user = get_user_model().objects.create_user(
+            email=email,
+            password=password,
+        )
+        self.assertEqual(user.email, email)
+        self.assertTrue(user.check_password(password))
+
+    def test_new_user_email_normalized(self):
+        """Test email is normalized for new users."""
+        sample_emails = [
+            ['test1@EXAMPLE.com', 'test1@example.com'],
+            ['test2@Example.com', 'test2@example.com'],
+            ['TEST3@EXAMPLE.COM', 'TEST3@example.com'],
+            ['test4@example.COM', 'test4@example.com'],
+        ]
+        for email, expected in sample_emails:
+            user = get_user_model().objects.create_user(email, 'sample123')
+            self.assertEqual(user.email, expected)
+
+    def test_new_user_withouth_email_raises_error(self):
+        """Test that creating a user withouth an email raises a ValueError."""
+        with self.assertRaises(ValueError):
+            get_user_model().objects.create_user('', 'test123')
+
+    def test_create_superuser(self):
+        """Test creating a superuser."""
+        user = get_user_model().objects.create_superuser(
+            'test@example.com',
+            'test123',
+        )
+        self.assertTrue(user.is_superuser)
+        self.assertTrue(user.is_staff)
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