Как решить ошибку в коде python vk_api?

import vk
import vk_api
import datetime
import time
from time import sleep
import random

z = random.randint(1, 99999999999)
g=''
a=''
b=''
acord=0
session1 = vk.AuthSession(access_token='')
vk_api = vk.API(session1, v=5.89)
value = vk_api.users.get(user_ids='', fields='last_seen') 
check = datetime.datetime.fromtimestamp(value[0]['last_seen']['time'])


def checker():
	
	global a
	global b
	global g

	
	time = datetime.datetime.fromtimestamp(value[0]['last_seen']['time'])

	if check == time and acord < 5 :
		acord = acord + 1
		g=''
		sleep(60)


	elif check == time and acord >= 5 and a != "OffLine"  :
		a=str("OffLine")
		b=''
		acord = acord + 1
		g="OffLine" + "  " +str(time)
		print("OffLine" + "  " +str(time))
		sleep(60)

	elif check !=time and b != "Online":
		a=''
		b=str("Online")
		acord = 0 
		check = time
		g="Online" + "  " + str(time)
		print("Online" + "  " + str(time))
		sleep(60)

	else:
		sleep(1)
		g= ''

vk = vk_api.VkApi(token="") 
messages = vk.method("messages.getConversations", {"offset":0, "count":20, "filter": "unread"}) 
if messages["count"] >= 1: 
	while True:
		checker()
		message = body.lower()
		vk.method("messages.send", {"peer_id": id, "message":g , "random_id":z})
		id = messages["items"][0]["last_message"]["from_id"]
		body = messages["items"][0]["last_message"]["text"]