update erd db and add display name to user access table

backend/apps/accounts/models.py

@@ -13,6 +13,7 @@ class UserManager(BaseUserManager):
         if not user_name:
             raise ValueError("user_name is required")
         extra_fields.setdefault("status", User.STATUS_ACTIVE)
+        extra_fields.setdefault("display_name", user_name)
         user = self.model(user_name=user_name, **extra_fields)
         user.set_password(password)
         user.save(using=self._db)
@@ -39,6 +40,7 @@ class User(AbstractBaseUser, PermissionsMixin):
 
     user_id = models.BigAutoField(primary_key=True)
     user_name = models.CharField(max_length=30, unique=True)
+    display_name = models.CharField(max_length=100)
     status = models.CharField(max_length=30, choices=STATUS_CHOICES, default=STATUS_ACTIVE)
     is_staff = models.BooleanField(default=False)
     is_active = models.BooleanField(default=True)