Get is a function that retrieves an account's metadata.

Update is a function that creates, updates, or deletes an account's metadata.

GetOpts is a structure that contains parameters for getting an account's metadata.

GetResult is returned from a call to the Get function.

UpdateOpts is a structure that contains parameters for updating, creating, or deleting an account's metadata.

UpdateResult is returned from a call to the Update function.

GetOptsBuilder allows extensions to add additional headers to the Get request.

UpdateOptsBuilder allows extensions to add additional headers to the Update request.