title: I keep getting Validation Error: client_id provided in the request does not match any of the registered clients
body: <p>This is driving me MAAAADDDD</p>
  
  <p>I'm trying to implement "Log In With PayPal" on Android.</p>
  
  <p>I'm using this sample app to try to get the login screen to show up. <a href="https://github.com/SeraphimSerapis/PayPal-Access-Android-Example" rel="nofollow noreferrer">https://github.com/SeraphimSerapis/PayPal-Access-Android-Example</a></p>
  
  <p>I have created an app on the <a href="https://devportal.x.com/" rel="nofollow noreferrer">https://devportal.x.com/</a> website as instructed, I just want to use OAuth 2.0, I did all the settings, no luck.</p>
  
  <p>Also, followed the answer in here <a href="https://stackoverflow.com/a/16199165/546439">https://stackoverflow.com/a/16199165/546439</a> i.e. created a seller account on developers.paypal and clearly chosen login with paypal access and credentials etc, still no luck</p>
  
  <p>I don't even know whether I should get the credentials from x.com or paypal.com, each of them give the same options but they return different keys, I am so lost.</p>
  
  <p>Please help.</p>
  
  <p><strong>UPDATE: added auth URL I am sending</strong></p>
  
  <p>all of these are not working</p>
  
  <p><a href="https://identity.x.com/xidentity/resources/authorize?client_id=AXbPkxDchMYBBAWn2UExvLytvvbJDDXn6u-9nWNgF_J7SZmwQkdDTwxHkuKe&amp;scope=https://identity.x.com/xidentity/resources/profile/me&amp;redirect_uri=http%3A%2F%2Faccess.com%2Findex.php&amp;response_type=code" rel="nofollow noreferrer">https://identity.x.com/xidentity/resources/authorize?client_id=AXbPkxDchMYBBAWn2UExvLytvvbJDDXn6u-9nWNgF_J7SZmwQkdDTwxHkuKe&amp;scope=https://identity.x.com/xidentity/resources/profile/me&amp;redirect_uri=http%3A%2F%2Faccess.com%2Findex.php&amp;response_type=code</a></p>
  
  <p><a href="https://identity.x.com/xidentity/resources/authorize?client_id=ATL6BhBqBYAwJnolhJDT04El5GtxxDzTMAQEb5kkCdZVDrMr_v5bWlPpw7nN&amp;scope=https://identity.x.com/xidentity/resources/profile/me&amp;redirect_uri=http%3A%2F%2Faccess.com%2Findex.php&amp;response_type=code" rel="nofollow noreferrer">https://identity.x.com/xidentity/resources/authorize?client_id=ATL6BhBqBYAwJnolhJDT04El5GtxxDzTMAQEb5kkCdZVDrMr_v5bWlPpw7nN&amp;scope=https://identity.x.com/xidentity/resources/profile/me&amp;redirect_uri=http%3A%2F%2Faccess.com%2Findex.php&amp;response_type=code</a></p>
  
  <p><a href="https://identity.x.com/xidentity/resources/authorize?client_id=6956fcaf5d9fb4bbea22af7ce7f4cc7a&amp;scope=https://identity.x.com/xidentity/resources/profile/me&amp;redirect_uri=http%3A%2F%2Faccess.com%2Findex.php&amp;response_type=code" rel="nofollow noreferrer">https://identity.x.com/xidentity/resources/authorize?client_id=6956fcaf5d9fb4bbea22af7ce7f4cc7a&amp;scope=https://identity.x.com/xidentity/resources/profile/me&amp;redirect_uri=http%3A%2F%2Faccess.com%2Findex.php&amp;response_type=code</a></p>