'Creates an HSM client.
:type label: string
:param label: The label for the client.
:type certificate: string
:param certificate: The contents of a Base64-Encoded X.509 v3
certificate to be installed on the HSMs used by this client.'

def create_luna_client(self, certificate, label=None):

    params = {'Certificate': certificate}
    if (label is not None):
        params['Label'] = label
    return self.make_request(action='CreateLunaClient', body=json.dumps(params))
