+1 for neglostyti’s question
I keep getting a 404 error and can’t find any information specific to private apps 
I have hosted the app on a HTTPS server, it doesn’t show up at all. The redirection is automatic to this URL : https://bevyz-dev.myshopify.com/admin/apps/e015fecd46f47853bb618592586ad896/, which show a 404.
What am I missing ? Any clue will be much appreciated,
Regards,
Simon