drivers/azure/azureutil/auth.go
func tenantIDPath(subscriptionID string) string {
	return filepath.Join(azureCredsPath(), fmt.Sprintf("%s.tenantid", subscriptionID))
}
func tenantIDPath(subscriptionID string) string {
	return filepath.Join(azureCredsPath(), fmt.Sprintf("%s.tenantid", subscriptionID))
}
// tenantIDPath returns the full path the tenant ID for the given subscription
// should be saved at.f