Created middleware to check if the user has a plex user linked to seasoned account. If not respond with 403 meaning you did have a authorization key, but this is forbidden; explaining in the response message that no plex account user id was found for this user and to please authenticate their plex account at authenticate endpoint.

seasoned_api/src/webserver/app.js

@@ -4,6 +4,7 @@ const bodyParser = require('body-parser');
 const tokenToUser = require('./middleware/tokenToUser');
 const mustBeAuthenticated = require('./middleware/mustBeAuthenticated');
 const mustBeAdmin = require('./middleware/mustBeAdmin');
+const mustHaveAccountLinkedToPlex = require('./middleware/mustHaveAccountLinkedToPlex');
 const configuration = require('src/config/configuration').getInstance();
 
 const listController = require('./controllers/list/listController');