List SSH public key(s) from LDAP.

def list(config):  # pragma: no cover
        """List SSH public key(s) from LDAP."""
        client = Client()
        client.prepare_connection()
        key_api = API(client)
        for key, values in key_api.get_keys_from_ldap().items():
            print("{}: ".format(key))
            for value in [v.decode() for v in values]:
                print("\t - {}".format(value))