[Feature Request] Allow to get Address and Credentials from qrCode

[Mannshoch]

If possible I wish to add an Account by taking a picture from a qrCode.

Maybe this code could be useful: https://github.com/zxing/zxing

See also Feature Request on: https://github.com/nextcloud/server/issues/4305
See also Feature Request on: https://github.com/nextcloud/android/issues/822

So I’m able to handout Caldav/Carddav/Webdav/Federation Links.
Our Club has many people without any Computer knowledge. If I setup their nextcloud access I could generate this codes to get them easy access by mobile-phone without have to deal with user names and passwords, also If I have to setup their phone.