# Functions
CredentialsFromEnvVar return content of credentials from environment variable.
CredentialsFromFile return content of credentials from file.
CredentialsFromGcloud to provide credentials form default gcloud command.
CredentialsFromString if user want to load credentials by their own.
New gcs storage gcs storage expect user already authenticated using 'gcs' command json path is a path to json service account path.
NewConfig to build a new config.
# Variables
error list.