Disallow user signup (#763)

Force-disabled user signups

pulseapi/users/models.py

@@ -11,6 +11,12 @@ from pulseapi.profiles.models import UserProfile
 
 class EmailUserManager(BaseUserManager):
     def create_user(self, name, email, password=None):
+        """
+        TEMPORARY MEASURE TO PREVENT SIGNUP SPAM,
+        SEE https://github.com/mozilla/network-pulse-api/issues/762
+        """
+        raise ValueError('Not accepting new users at this time.')
+
         if not name:
             raise ValueError('Users must have a name')