Return access token when calling get_access_token()

tweepy/auth.py

@@ -81,6 +81,7 @@ class OAuthHandler(AuthHandler):
       # send request
       resp = urlopen(Request(self.ACCESS_TOKEN_URL, headers=request.to_header()))
       self.access_token = oauth.OAuthToken.from_string(resp.read())
+      return self.access_token
     except Exception, e:
       raise TweepError(e)