Default to the first authenticated user if the list's user is not found

media/trakt.py

@@ -161,7 +161,9 @@ class Trakt:
     def oauth_headers(self, user):
         headers = self.headers
 
-        if user is None:
+        if user is None or user not in self.cfg['trakt'].keys():
+            log.debug('No authenticated user corresponds to "%s", so the first user in the config to authenticated.', user)
+
             users = self.cfg['trakt']
             
             if 'api_key' in users.keys():