title: Getting a "Unexpected character '<' at line 1, column 0." while trying to connect to Google using GoogleApis library
body: <p>I'm using Google Apis, instead of Google Sign In, to connect to Google on my app because I'm developping with Xamarin.</p>
  
  <p>This is the library I'm using : <a href="https://github.com/xamarin/google-apis" rel="nofollow">https://github.com/xamarin/google-apis</a></p>
  
  <p>When I'm logging in, i get this error :</p>
  
  <p><strong>Authentication Error</strong>
  Unexpected character '&lt;'. At line 1, column 0.</p>
  
  <p>Maybe it's because my AccessTokenUrl is not good, but I've tried many things. I know for a fact that my ClientId, my RedirectUrl and my Secret are okay.</p>
  
  <p>When logging in, Google asks correctly for the good permissions that I want, but after I accept, this is when I receive the error.</p>
  
  <p>I've tried finding the request to see if there was the '&lt;' in it but had no luck accessing it.</p>
  
  <p>Is there a good way to connect to Google with Xamarin using this library or I'm just doing something bad?</p>
  
  <p>Should I just do it nativaly on iOS and Android?</p>
  
  <p>Thanks</p>