Embed private vimeo videos in a ready ionic app

Please read the description first: I have an already ready ionic app, with all the project files, displaying a wordpress website through REST API (not a webview app). I add in the website posts vimeo private videos, which are limited to the website domain, since I have a vimeo Pro offer (private videos are not downloadble and readable only on my domain). The videos play well in the desktop. Unfortunately they do not play in the app because vimeo doesn't recognize the app as my own domain defined in the settings. When the private video is embeded using iframe or just with div, private video isn't playable, instead error is displayed such as : Sorry, Because of its privacy settings, this video cannot be played here. I need a woraround to make these private vimeo videos readable in the app without being downlaodble.