Fetch credentials for magic github proxy (#7459)
Fetch credentials for magic github proxy (#7459)


tseaver/google-cloud-python,tseaver/google-cloud-python,googleapis/google-cloud-python,tswast/google-cloud-python,GoogleCloudPlatform/gcloud-python,GoogleCloudPlatform/gcloud-python,googleapis/google-cloud-python,tseaver/google-cloud-python,tswast/google-cloud-python,tswast/google-cloud-python