feat(Users): #PRWLR-4717 add /users endpoints and basic auth (#43)

* feat(SimpleJWT): PRWLR-4717 add djangorestframework-simplejwt dep

* feat(SimpleJWT): PRWLR-4717 add basic configuration and env variables

* feat(Users): PRWLR-4717 add model and security constraints

* feat(Users): PRWLR-4717 add serializers

* feat(Users): PRWLR-4717 add views

* test(Conftest): PRWLR-4717 add user and authenticated client fixtures

* fix(Unit tests): PRWLR-4717 add automated authentication to all unit tests

* fix(Authentication): PRWLR-4717 add authentication class and update tests

* test(Users): PRWLR-4717 add unit tests

* test(Users): PRWLR-4717 add integration tests

* chore(Schema): PRWLR-4717 update API schema

* fix(User): PRWLR-4717 fix password validation

* feat(Validators): PRWLR-4717 add MaxLength password validator

* fix(User): PRWLR-4717 update User model to delete admin fields

* chore(Serializers): PRWLR-4717 add docstrings and update serializers

* chore(Fixtures): PRWLR-4717 add dev user

* chore(Users): PRWLR-4717 raise DRF NotFound instead of returning response

src/backend/api/models.py

@@ -1,6 +1,8 @@
 import re
 from uuid import uuid4, UUID
 
+from django.contrib.auth.models import AbstractBaseUser
+from django.contrib.auth.validators import UnicodeUsernameValidator
 from django.contrib.postgres.indexes import GinIndex
 from django.contrib.postgres.search import SearchVector, SearchVectorField
 from django.core.validators import MinLengthValidator
@@ -9,10 +11,18 @@ from django.utils.translation import gettext_lazy as _
 from django_celery_results.models import TaskResult
 from uuid6 import uuid7
 
-from api.db_utils import ProviderEnumField, StateEnumField, ScanTriggerEnumField
+from api.db_utils import (
+    ProviderEnumField,
+    StateEnumField,
+    ScanTriggerEnumField,
+    CustomUserManager,
+)
 from api.exceptions import ModelValidationError
-from api.rls import RowLevelSecurityConstraint
-from api.rls import RowLevelSecurityProtectedModel
+from api.rls import (
+    RowLevelSecurityProtectedModel,
+    RowLevelSecurityConstraint,
+    BaseSecurityConstraint,
+)
 
 
 class StateChoices(models.TextChoices):
@@ -24,6 +34,31 @@ class StateChoices(models.TextChoices):
     CANCELLED = "cancelled", _("Cancelled")
 
 
+class User(AbstractBaseUser):
+    id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
+    username = models.CharField(
+        max_length=150, unique=True, validators=[UnicodeUsernameValidator()]
+    )
+    email = models.EmailField(max_length=254, unique=True)
+    is_active = models.BooleanField(default=True)
+    date_joined = models.DateTimeField(auto_now_add=True, editable=False)
+
+    USERNAME_FIELD = "username"
+    REQUIRED_FIELDS = ["email"]
+
+    objects = CustomUserManager()
+
+    class Meta:
+        db_table = "users"
+
+        constraints = [
+            BaseSecurityConstraint(
+                name="statements_on_%(class)s",
+                statements=["SELECT", "INSERT", "UPDATE", "DELETE"],
+            )
+        ]
+
+
 class Provider(RowLevelSecurityProtectedModel):
     class ProviderChoices(models.TextChoices):
         AWS = "aws", _("AWS")