title: getting an error when trying to use Google API with Client Secrets File and OAuth 2.0
body: <p>I just can't understand what am I doing wrong when using <strong>YouTube API</strong>, and specifically the <em>client secrets file</em>.</p>
  
  <p>I've created a <em>client secrets file</em> by following the steps on the <em>google developers</em> website —</p>
  
  <ol>
  <li>go to <a href="https://console.developers.google.com/" rel="nofollow">https://console.developers.google.com/</a></li>
  <li>go to API Manager section</li>
  <li>go to Credentials tab</li>
  <li>Add Credentials button -> <strong>OAuth 2.0 Client ID</strong></li>
  <li>Application type -> Web Application</li>
  <li>The <em>client secret file</em> is ready to be downloaded now, so I download it and place it on my pc</li>
  </ol>
  
  <p>Now, I try to run this basic code snippet, presented on the <em>google developers</em> website <a href="https://developers.google.com/youtube/v3/code_samples/python#rate__like__a_video" rel="nofollow">https://developers.google.com/youtube/v3/code_samples/python#rate__like__a_video</a></p>
  
  <pre><code>    import httplib2
      import os
      import sys
  
      from apiclient.discovery import build
      from apiclient.errors import HttpError
      from oauth2client.client import flow_from_clientsecrets
      from oauth2client.file import Storage
      from oauth2client.tools import argparser, run_flow
  
  
      CLIENT_SECRETS_FILE = "C:\\Python27\\Projects\\YoutubeBot_client_secrets.json"
  
      # This variable defines a message to display if the CLIENT_SECRETS_FILE is
      # missing.
      MISSING_CLIENT_SECRETS_MESSAGE = "something went wrong."
  
      # This OAuth 2.0 access scope allows for full read/write access to the
      # authenticated user's account.
      YOUTUBE_READ_WRITE_SCOPE = "https://www.googleapis.com/auth/youtube"
      YOUTUBE_API_SERVICE_NAME = "youtube"
      YOUTUBE_API_VERSION = "v3"
  
      def get_authenticated_service(args):
        flow = flow_from_clientsecrets(CLIENT_SECRETS_FILE,
          scope=YOUTUBE_READ_WRITE_SCOPE,
          message=MISSING_CLIENT_SECRETS_MESSAGE)
        storage = Storage("%s-oauth2.json" % sys.argv[0])
        credentials = storage.get()
        if credentials is None or credentials.invalid:
          credentials = run_flow(flow, storage, args)
        return build(YOUTUBE_API_SERVICE_NAME, YOUTUBE_API_VERSION,
          http=credentials.authorize(httplib2.Http()))
  
      # Add the video rating. This code sets the rating to "like," but you could
      # also support an additional option that supports values of "like" and
      # "dislike."
      def like_video(youtube, video_id):
        youtube.videos().rate(
          id=video_id,
          rating="like"
        ).execute()
  
      if __name__ == "__main__":
        argparser.add_argument("--videoid", default="L-oNKK1CrnU", 
         help="ID of video to like.")
        args = argparser.parse_args()
  
        youtube = get_authenticated_service(args)
        try:
          like_video(youtube, "8hj6BK8WGtA" )
        except HttpError, e:
          print "An HTTP error %d occurred:\n%s" % (e.resp.status, e.content)
        else:
          print "%s has been liked." % args.videoid
  </code></pre>
  
  <p>And I just receive an error (the <code>MISSING_CLIENT_SECRETS_MESSAGE</code> error) regarding my client secret file:</p>
  
  <pre><code>SystemExit: something went wrong.
  </code></pre>
  
  <p>And that's the root cause -</p>
  
  <pre><code>---&gt; 29     message=MISSING_CLIENT_SECRETS_MESSAGE)
  </code></pre>