fix - overwrite useranme field in User from AbstractUser

apps/authentication/models.py

@@ -2,11 +2,18 @@ from django.contrib.auth.models import (
     AbstractUser
 )
 from django.db import models
+from django.utils.translation import gettext_lazy as _
 
 from apps.core.models import BaseModel
 
 
 class User(AbstractUser, BaseModel):
+    username = models.CharField(
+        max_length=150,
+        help_text=_(
+            "Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only."
+        ),
+    )
     mobile = models.CharField(max_length=18, null=True)
     phone = models.CharField(max_length=18, null=True)
     national_code = models.CharField(max_length=16, null=True)