post
{protocol}://{base-url}/api/v2/auth/credentials//test_connection/
Triggers an asynchronous test connection job for the given credential.
Validates that the stored credentials can successfully connect to the associated data source.
Only the credential owner can trigger a test connection.
Pre-validation:
- The auth context must have valid authentication configuration (buildable auth proto)
- The auth context must have at least one associated data product
Returns a job_id that can be polled via the test_connection_status endpoint.