Enhance User model: add email field with unique constraint, update id_card field to allow null values, and include verified field. Update UserAdmin to display verified field. Improve device listing to filter by logged-in user.

api/managers.py

@@ -1,20 +1,23 @@
-from django.contrib.auth.models import BaseUserManager
+from typing import Optional
+from django.contrib.auth.models import UserManager as BaseUserManager
 
 
 class CustomUserManager(BaseUserManager):
-    def create_user(self, username, password=None, **extra_fields):
+    def create_user(
+        self, username, email=None, password: Optional[str] = None, **extra_fields
+    ):
         """Create and return a user with an email and password."""
         if not username:
             raise ValueError("The Username field must be set")
 
-        user = self.model(username=username, **extra_fields)
+        user = self.model(username=username, email=email, **extra_fields)
         user.set_password(password)
         user.save(using=self._db)
         return user
 
-    def create_superuser(self, username, password=None, **extra_fields):
+    def create_superuser(self, username, email=None, password=None, **extra_fields):
         """Create and return a superuser with an email and password."""
-        extra_fields.setdefault('is_staff', True)
-        extra_fields.setdefault('is_superuser', True)
+        extra_fields.setdefault("is_staff", True)
+        extra_fields.setdefault("is_superuser", True)
 
         return self.create_user(username, password, **extra_fields)