Logs in user to Flarum when he logs in to Craft CMS
In Craft, provide Flarum URL, username and password of admin user
In Flarum, just enable Craft Login extension
http://craft.dev/actions/flarumLogin/token/getToken needs to be run after saving the settings
The login is performed based on usermame
Accompanied by https://github.com/intoeetive/flarum-craftlogin