♻️(models) refactor user email fields

The email field on the user is renamed to "admin_email" for clarity. The
"email" and "name" fields of user's main identity are made available on
the user model so it is easier to access it.

src/backend/demo/management/commands/create_demo.py

@@ -115,7 +115,7 @@ def create_demo(stdout):
         for i in range(defaults.NB_OBJECTS["users"]):
             queue.push(
                 models.User(
-                    email=f"user{i:d}@example.com",
+                    admin_email=f"user{i:d}@example.com",
                     password="!",
                     is_superuser=False,
                     is_active=True,
@@ -126,12 +126,12 @@ def create_demo(stdout):
         queue.flush()
 
     with Timeit(stdout, "Creating identities"):
-        users_values = list(models.User.objects.values("id", "email"))
+        users_values = list(models.User.objects.values("id", "admin_email"))
         for user_dict in users_values:
             for i in range(
                 random.choices(range(5), weights=[5, 50, 30, 10, 5], k=1)[0]
             ):
-                user_email = user_dict["email"]
+                user_email = user_dict["admin_email"]
                 queue.push(
                     models.Identity(
                         user_id=user_dict["id"],

src/backend/demo/management/commands/createsuperuser.py

@@ -17,7 +17,7 @@ class Command(BaseCommand):
     def add_arguments(self, parser):
         """Define required arguments "email" and "password"."""
         parser.add_argument(
-            "--email",
+            "--admin_email",
             help=("Email for the user."),
         )
         parser.add_argument(
@@ -30,11 +30,11 @@ class Command(BaseCommand):
         Given an email and a password, create a superuser or upgrade the existing
         user to superuser status.
         """
-        email = options.get("email")
+        email = options.get("admin_email")
         try:
-            user = User.objects.get(email=email)
+            user = User.objects.get(admin_email=email)
         except User.DoesNotExist:
-            user = User(email=email)
+            user = User(admin_email=email)
             message = "Superuser created successfully."
         else:
             if user.is_superuser and user.is_staff:

src/backend/demo/tests/test_commands_create_demo.py

@@ -31,3 +31,14 @@ def test_commands_create_demo():
     assert models.Identity.objects.exists()
     assert models.Team.objects.count() == 3
     assert models.TeamAccess.objects.count() >= 3
+
+
+def test_commands_createsuperuser():
+    """
+    The createsuperuser management command should create an use
+    with superuser permissions.
+    """
+
+    call_command("createsuperuser")
+
+    assert models.User.objects.count() == 1