Google\Auth\CredentialSource

Authenticates requests using AWS credentials.

ExecutableSource enables the exchange of workload identity pool external credentials for Google access tokens by retrieving 3rd party tokens through a user supplied executable. These scripts/executables are completely independent of the Google Cloud Auth libraries. These credentials plug into ADC and will call the specified executable to retrieve the 3rd party token to be exchanged for a Google access token.

Retrieve a token from a file.

Retrieve a token from a URL.