Update terminal api

apps/users/models/authentication.py

@@ -25,11 +25,9 @@ class AccessKey(models.Model):
     def get_secret(self):
         return str(self.secret)
 
-    def __unicode__(self):
+    def __str__(self):
         return str(self.id)
 
-    __str__ = __unicode__
-
 
 class PrivateToken(Token):
     """Inherit from auth token, otherwise migration is boring"""

apps/users/models/user.py

@@ -23,9 +23,9 @@ __all__ = ['User']
 
 class User(AbstractUser):
     ROLE_CHOICES = (
-        ('Admin', _('Administrator')),
-        ('User', _('User')),
-        ('App', _('Application'))
+        ('Admin', 'Administrator'),
+        ('User', 'User'),
+        ('App', 'Application')
     )
 
     username = models.CharField(max_length=20, unique=True, verbose_name=_('Username'))