Prefer "ensure_one" to a comment

model/auth_saml.py

@@ -43,5 +43,4 @@
     @api.multi
     def _get_auth_request(self, state):
         """build an authentication request and give it back to our client
-        WARNING: this method cannot be used for multiple ids
         """
@@ -47,4 +46,7 @@
         """
+
+        self.ensure_one()
+
         login = self._get_lasso_for_provider()
 
         # ! -- this is the part that MUST be performed on each call and