Fixed: issue with Requesting the access_token: You must provide a cli…

[functorcode]

…ent_id

Problem: It was not receiving access_token while exchanging code.
Error: You must provide a client_id

Solution:
File: oauth2.py
Function: exchange_for_access_token
+headers = {'Content-type': 'application/x-www-form-urlencoded'}
+response, content = http_object.request(url,headers=headers,method="POST", body=data)
-response, content = http_object.request(url,method="POST", body=data)