feat(users): normalize email identity storage

apps/users/services/managers.py

@@ -1,6 +1,7 @@
 from django.contrib.auth.models import BaseUserManager
 
 from core.models.base import SoftDeleteManager
+from apps.users.email_identity import normalize_email_identity
 
 
 class UserManager(BaseUserManager, SoftDeleteManager):
@@ -9,6 +10,8 @@ class UserManager(BaseUserManager, SoftDeleteManager):
     def _create_user(self, mobile, password, **extra_fields):
         if not mobile:
             raise ValueError("Mobile must be set")
+        if "email" in extra_fields:
+            extra_fields["email"] = normalize_email_identity(extra_fields.get("email"))
         user = self.model(mobile=mobile, **extra_fields)
         user.set_password(password)
         user.save(using=self._db)