Here we go:
import requests as rq
data = { 'grant_type': 'password',
'username': 'asdadsasd',
'password': 'asdasdas',
'client_id': 'asdasdasdasd' }
resp = rq.post( 'https://online-go.com/oauth2/token/', data=data)
print(resp.text)
gives out:
{"access_token": "EUy8ClWonvnKoG3YXyLp00nJ2n4lQL", "expires_in": 36000, "token_type": "Bearer", "scope": "read write groups", "refresh_token": "gjMhCaSbJcXgAJOzwwY9iVQkTqQItL"}
Thanks again!