Discord bot using api.ai to process messages

discordbotapiai.py

import discord
import asyncio
import apiai
import json

client = discord.Client()

// Api.ai access token.
CLIENT_ACCESS_TOKEN = 'access-token'
def query_apiai(query):
    ai = apiai.ApiAI(CLIENT_ACCESS_TOKEN)

    request = ai.text_request()

    request.lang = 'es'  # optional, default value equal 'en'

    #request.session_id = "<SESSION ID, UNIQUE FOR EACH USER>"

    request.query = query

    response = request.getresponse()
    json_obj = json.loads(response.read().decode('utf-8'))
    if 'messages' in json_obj['result']['fulfillment']:
        return json_obj['result']['fulfillment']['messages'][0]['speech']
    else:
        return False

@client.event
async def on_ready():
    print('Logged in as')
    print(client.user.name)
    print(client.user.id)
    print('------')

@client.event
async def on_message(message):
    if message.author == client.user:
        return
    apiai_response = query_apiai(message.content)
    if apiai_response:
        await client.send_message(message.channel, apiai_response)
	
discordbot_token = 'discord-bot-token'
client.run(discordbot_token);