title: cannot retrieve access token for oauth2
body: <p>I am trying to get an Oauth2 access token to use adwords api. I am using google-api-ads-ruby and trying to follow the instruction here, <a href="https://github.com/googleads/google-api-ads-ruby/wiki/API-access-using-own-credentials-(installed-application-flow)" rel="nofollow noreferrer">https://github.com/googleads/google-api-ads-ruby/wiki/API-access-using-own-credentials-(installed-application-flow)</a>. I have developer token, client id, secret, and every other info inserted into adwords_api.yml. And when I run setup_oauth2.rb it displays as below :</p>
  
  <pre><code>Hit Auth error, please navigate to URL:
  https://accounts.google.com/o/oauth2/auth?access_type=offline&amp;client_id=309181******-lnbictq23g17o7pp3e6v7vdqq9juinv9.apps.googleusercontent.com&amp;redirect_uri=urn:ietf:wg:oauth:2.0:oob&amp;response_type=code&amp;scope=https://www.googleapis.com/auth/adwords
  log in and type the verification code: 
  </code></pre>
  
  <p>so as the document said, I copied and pasted the url in a browser, but I keep getting this: </p>
  
  <p><a href="https://i.stack.imgur.com/m8AST.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/m8AST.png" alt="enter image description here"></a></p>
  
  <p>I also have tried creating new client ID with selecting 'other' instead of 'web application'. Although many people on the web saying choose 'installed application', there is no such option. All options I see are only this :</p>
  
  <p><a href="https://i.stack.imgur.com/HqXu4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HqXu4.png" alt="enter image description here"></a></p>
  
  <p>I don't know how many days I have been stuck on this. Please give any advice if you have any. thank you.</p>