ensure OIDC is supported during nextcloud login
flow is:
1. nextcloud
2. oxicloud login ( direct pass or OIDC according config)
3. drive picker (if user has multiple drive)
4. success page + backchannel login to nextcloud
- ensure Oxicloud s correctly functional with OIDC login
- refresh token works
- givenname, familyname, picture are imported in users' informations
- test relogin (server is not using same path)
- test email verified
- test admin group provided from IdP