[QA] no logout from identity provider possible

[jnweiger]

See with android App version ownCloud release Version 3.0.1 (5e553f0)

Actual behaviour

• I have an owncloud server that requires login via keycloak idp (using the server openidconnect app version 2.2.0-rc.1)
• Connect android app with the server, the IDP broweser window opens, I can choose a user and log in. OK
  
• Use the trashcan icon to delete the account again.
• Connect again (without waiting more than 10 minutes)
  • The IDP immediately authorizes the app, without showing a user password dialog. BAD
  • There is no way to choose a differnet user for this server. BAD.
• Wait 10 Minutes. Connect to the same server again.
  • A message appears saying my token is expired, I need to log in.
    

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• Click "Einloggen" (log in). The app refreshes, again without asking for username or password and files are now accessible for the original user.
  

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• Note, that the expired message remains at the bottom of the screen, and upload does not work. BAD.
• have to click "Einloggen" again. After that, the message is gone and upload works. Okayish

Tell us what should happen.

• when the account is removed, it should also be logged out from the IDP, so that any remainng session tokens are invalidated.
• it should always be possible to choose the username, after entering a server URL.

[jnweiger]

Workaround:
Log out, then wait until the next morning.
Connect to the same server again.
Now I get the complete login dialog with username and password from the IDP.

[michaelstingl]

Not implemented yet. Needs support for OIDC frontchannel-, backchannel-, whateverchannel-logout in mobile and desktop apps…

[abelgardep]

Related to this one? #3769