How to use the fair.plugin.token.TokenTimeout function in fair

def test_token():
    identity = 'somebody'
    Token.get_key = MagicMock()
    Token.get_key.return_value = 'p' * 16

    pytest.raises(TokenInvalid, Token.create, 'plaintext', 'error timestamp')

    timestamp = int(time.time())
    assert Token.create(identity, timestamp) == Token.create(identity, timestamp)
    assert Token.create(identity, timestamp) != Token.create(identity, timestamp + 1)

    cipher_text = Token.create(identity)
    assert Token.check(identity, cipher_text) == True

    cipher_text = Token.create(identity, timestamp - TOKEN_TIME_OUT)
    pytest.raises(TokenTimeout, Token.check, identity, cipher_text)

    key = Token.get_key(identity)
    aes_obj = AES.new(key, AES.MODE_CBC, key[1:] + 'x')
    cipher_text = base64.b16encode(aes_obj.encrypt('error timestamp '))
    pytest.raises(TokenInvalid, Token.check, identity, cipher_text)

    Token.get_key.return_value = 't' * 16
    pytest.raises(TokenInvalid, Token.check, identity, cipher_text)

    # error key
    Token.get_key.return_value = 'p' * 13
    pytest.raises(TokenKeyInvalid, Token.create, identity)
    pytest.raises(TokenKeyInvalid, Token.check, identity, cipher_text)

if len(cipher_text) % 16 != 0:
            raise TokenInvalid('Token must be a multiple of 16 in length')
        key = self.__key_provider(identity)
        try:
            aes_obj = AES.new(key, AES.MODE_CBC, key[1:] + 'x')
        except ValueError:
            raise TokenKeyInvalid('Key must be 16 bytes long')
        try:
            byte_text = aes_obj.decrypt(base64.b16decode(cipher_text, True)).rstrip(b'\x00')
            plaintext = byte_text[: -16]
        except binascii.Error:                      # base64 raise
            raise TokenInvalid('Token invalid')
        try:
            # check time
            if time.time() - int(plaintext) > TOKEN_TIME_OUT:
                raise TokenTimeout('Token time out')
        except ValueError:
            raise TokenInvalid('Token invalid, must be timestamp')
        return True