'Get keypair in API cells by name. Just return None if there is
no match keypair.'

def get_keypair_at_top(self, message, user_id, name):

    if (not self._at_the_top()):
        return
    try:
        return objects.KeyPair.get_by_name(message.ctxt, user_id, name)
    except exception.KeypairNotFound:
        pass
