AddConfigPath adds a path for Viper to search for the config file in.

BindPFlag binds a specific key to a pflag (as used by cobra).

ReadInConfig will discover and load the configuration file from disk and key/value stores, searching in one of the defined paths.

Set sets the value for the key in the override register.

SetConfigName sets name for the config file.

Unmarshal unmarshals the config into a Struct.

Default is the default, pre-configured instance of viper.