Zenodo authorization fails

[Maurier]

Description of the bug Authorizing Zonodo often fails with the error invalid_grant. It can be reproduced somewhat consistently, but it also succeeds at times, making the authorization process unreliable.

Steps to reproduce the bug:

1. Go to Account & Settings page.
2. Go to the Authorized Repositories tab.
3. Try to authorize and deauthorize Zenodo multiple times.
4. Authorization will often fail with the error invalid_grant.

Expected behavior Authorization and deauthorization work as expected.

Additional information Zenodo OAuth 2.0 endpoints: From https://zenodo.org/account/settings/applications/, click on item under Developer applications.

DSP configuration: https://github.com/cznethub/dspback/blob/develop/dspback/routers/repository_authorization.py#L37 https://github.com/cznethub/dspback/blob/develop/dspback/config/__init__.py#L115

Approach:

• [x] Try to resend the request upon failure.
  • Did not work. Another error is thrown if the request is retried.
• [x] Try updating authlib dependencies to a newer version.
  • Did not work.
• [x] Monitor the outgoing request and look for errors in implementation.
  • The requests look correct.
• [x] Try to reproduce the issue in an isolated project without any authentication libraries.
  • An issue has been created at https://github.com/zenodo/zenodo-rdm/issues/878
  • [ ] It would be good to include a reproducible link.
• [ ] Fail gracefully. Restart authorization process?

[pkdash]

@Maurier I have created this ticket in Zenodo.