See #9115 (comment)
In the the credentials option for the client constructor, the type reference for Google\Auth\FetchAuthTokenInterface is not linked. This is because we don't publish interfaces to the reference documentation, but we should do so, or at least find a way to improve the documentation by guiding users to the credentials classes in google/auth such as UserRefrechCredentials.
See #9115 (comment)
In the the
credentialsoption for the client constructor, the type reference forGoogle\Auth\FetchAuthTokenInterfaceis not linked. This is because we don't publish interfaces to the reference documentation, but we should do so, or at least find a way to improve the documentation by guiding users to the credentials classes ingoogle/authsuch as UserRefrechCredentials.