diff --git a/core/models.py b/core/models.py
index bb27721..6157d28 100644
--- a/core/models.py
+++ b/core/models.py
@@ -26,6 +26,7 @@ class MyUserManager(BaseUserManager):
         return self.create_user(email, password, **extra_fields)
 
 class MyUser(AbstractBaseUser, PermissionsMixin):
+    username = models.CharField(_('username'), unique=True, max_length=60)
     email = models.EmailField(_('email address'), unique=True)
     first_name = models.CharField(_('first name'), max_length=30, blank=True)
     last_name = models.CharField(_('last name'), max_length=150, blank=True)
@@ -34,7 +35,6 @@ class MyUser(AbstractBaseUser, PermissionsMixin):
     
     objects = MyUserManager()
 
-    USERNAME_FIELD = 'email'
     REQUIRED_FIELDS = []
 
     def __str__(self):