Github token retriever script in python

gh-token-retriever.py

#!/usr/bin/env python
import requests
import getpass
import json

class GithubTokenRetriever:
    url = 'https://api.github.com/authorizations'

    def __init__(self, username = '', password = '', note = '', otp = ''):
        self.user = {
            'username': username if username else raw_input('Github username: '),
            'password': password if password else getpass.getpass('Github password: '),
            'otp': otp,
        }
        self.payload = { 'note': note if note else raw_input('Note (optional): ') }

    def retrieve(self):
        response = self._requestToken()

        if not self.user['otp'] \
        and response.status_code == 401 \
        and response.headers.get('X-GitHub-OTP', '').startswith('required'):
            self.user['otp'] = raw_input('Github one-time password: ')
            response = self._requestToken() # request the token again, using the OTP this time

        self.user.clear()
        
        if response.status_code >= 400:
            msg = response.json().get('message', 'Unknown error')
            raise Exception(msg, response.status_code)
            
        return response.json().get('token')

    def _requestToken(self):
        response = requests.post(
            self.url,
            auth = (self.user.get('username'), self.user.get('password')),
            data = json.dumps(self.payload),
            headers = { 'X-GitHub-OTP': self.user.get('otp') }
        )
        return response

def run():
    import sys
    try:
        retriever = GithubTokenRetriever()
        token = retriever.retrieve()
        print "Here is your access token:", token
    except KeyboardInterrupt:
        print
        sys.exit(1)
    except Exception as ex:
        message, code = ex.args
        print '\nError %s: %s' % (code, message), '\n'
        run()

if __name__ == '__main__':
    run()