Google Cloud SDK Credentials helper
The standard Google Cloud Platform SDK for Go ignores the gcloud configuration for default project and account to use the authentication with.
The function GetCredentials returns a google.Credentials object based upon the active
configuration. This allows you to create utilities that will work in the same context as gcloud.
The function GetConfig will return the properties of the active configuration in gcloud.
The implementation entirely depends on the output of gcloud config config-helper, which is intended to
utilities to use the gcloud configuration. Oddly enough, Google also promises it to be a volatile and
unstable interface. So if Google broke it or changed it, let me know perhaps we can fix the implementation
of this library :-)
read the blog How to authenticate to Google Cloud Platform using the active gcloud configuration