989721746a
Merge https://github.com/google/adk-python/pull/6660 Change service-account OpenAPI helpers to return an OAuth2 client-credentials scheme so CredentialManager can perform token exchange. Also, bypass the credential service caching for all SERVICE_ACCOUNT credentials. This ensures we don't cache exchanged tokens that cannot be refreshed, but means token exchange will run on each tool execution if the manager/exchanger is not reused. Fixes #6656 PiperOrigin-RevId: 966305100