django reset framework token(jwt token) add expiration

 by default 

rest framework token does not expire

can add customer helpers to expire token(token.delete) and auto renew the token (token = Token.objects.create(user = token.user)

https://medium.com/@yerkebulan199/django-rest-framework-drf-token-authentication-with-expires-in-a05c1d2b7e05

from rest_framework.authtoken.models import Token
	from datetime import timedelta
	from django.utils import timezone
	from django.conf import settings
	#this return left time
	def expires_in(token):
	time_elapsed = timezone.now() - token.created
	left_time = timedelta(seconds = settings.TOKEN_EXPIRED_AFTER_SECONDS) - time_elapsed
	return left_time
	# token checker if token expired or not
	def is_token_expired(token):
	return expires_in(token) < timedelta(seconds = 0)
	# if token is expired new token will be established
	# If token is expired then it will be removed
	# and new one with different key will be created
	def token_expire_handler(token):
	is_expired = is_token_expired(token)
	if is_expired:
	token.delete()
	token = Token.objects.create(user = token.user)
	return is_expired, token