New Features

• OIDC login Support: Tests can now use bearer token authentication by setting USE_BEARER_TOKEN=true environment variable
• Tokens are cached per user to avoid regenerating on each request
• Expired tokens are refreshed using refresh tokens - need for admin (token TTL = 5min, after refresh token)

Usage

Enable bearer token authentication in tests:
USE_BEARER_TOKEN=true make test-acceptance-api BEHAT_FEATURE=tests/acceptance/features/..

I decided to use the USE_BEARER_TOKEN variable first.
Basic Auth remains the default for now.
Once all tests work with OIDC, I’ll make it the default authentication method.

Improvements

• During debugging, I noticed that after creating a user (we check 201), we additionally make a GET request to check for the user's existence, which I consider unnecessary. I deleted it
• reworked creating multiple users methods to using HttpRequestHelper->sendRequest()
• checking that share is syncing in some tests (were failed in CI)
• adjusted setup in Ci for multitenancy tests and updated description how to run tests localy multiTenancyTests #1313 (comment)