def post(req, api):
    """
    Make a post request to `localhost:8888/hello/world`
    With the body `{"message": "my_message"}
    It should return `{"request": "my_message", "result":"HELLO WORLD!!! Success on local, in method post!"}`
    
    Input:
        message: string
        
    Output:
        message: string
        result: string
    """
    
    message = req.body['message']

    return {
        'request': message,
        'result': req.hello_world_message
    }