CREATE JWT AND ACCESS TOKEN USING PYTHON LIBRARY'S

iFormBuilder-API-AccessToken(Python).py

import jwt, base64, os, uuid, sys, urllib, urllib2, json, collections, traceback, time, datetime 
from datetime import timedelta
#############################################################################
get an jwt then make call to get access token ##

#############################################################################
def GetAccessToken(iFormUrl, iFormClientKey, iFormClientSecret): 
expTime = datetime.datetime.utcnow() + datetime.timedelta(seconds=600) 
nowTime = datetime.datetime.utcnow() 
payload = {"iss": iFormClientKey, 
"aud": iFormUrl + "/exzact/api/oauth/token", 
"exp": expTime, 
"iat": nowTime} 
encoded = jwt.encode(payload, iFormClientSecret, algorithm='HS256') 
#print encoded 
tokenData = { 'grant_type': 'urn:ietf:params:oauth:grant-type:jwt-bearer',
'assertion': encoded 
} 
tokenResponse = urllib2.urlopen(iFormUrl + '/exzact/api/oauth/token', urllib.urlencode(tokenData)) 
responseString = tokenResponse.read() 
#print "responseString is: " + responseString
json_acceptable_string = responseString.replace("'", "\"") 
responseDictionary = json.loads(json_acceptable_string)
#for key, value in responseDictionary.iteritems() : 
#print key, value 
token = responseDictionary.get("access_token", "none") 
print "the token is: " + token 
return token

Code sample for this example:
https://iformbuilder.zendesk.com/hc/en-us/community/posts/202919374-Get-a-JWT-and-Access-Token-using-Python-Library-s

every time i try and request a token it is giving me error 405 the only thing i have changed is

expTime = int(time.time()) + 600
nowTime = int(time.time())

other then that everything is the same, I know I am passing the function the correct data I just cant figure out why its refusing me!!
Any help?