New returns a configured `Client`.

URL is the default URL for the host of the Usage API.

Client handles all of the heavy lifting of talking to the Usage API for you.

Registration is used to collect data needed by Enterprise to properly start the registration Process.

SimpleError wraps simple error messages that come from the Usage API, such as: {"error":"json: cannot unmarshal number into Go value of type string"}.

ValidationErrors wraps more complex validation errors that the Usage API generates.

Saveable needs to be implemented for types that want to be able to be saved to the Usage API.

Tags is a mapping of key/values representing tags in an InfluxDB instance.