title: Cannot resolve symbol default_web_client_id GoogleSignInOptions Android Firebase
body: <p>My project works fine for last six month and app in play store. For an update,  I reopen the project shows default_web_client not resolved for the following piece of code.  </p>
  
  <pre><code>GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                  .requestIdToken(getString(R.string.default_web_client_id))
                  .requestEmail()
                  .build();
  </code></pre>
  
  <p>I try the following methods,</p>
  
  <p>1.Clean and rebuild</p>
  
  <p>2.Clear cache and restart</p>
  
  <p>3.Set <code>getString(R.string.default_web_client_id)</code> as empty string and run the project to generate </p>
  
  <pre><code>app/build/generated/res/google-services/{build_type}/values/values.xml
  </code></pre>
  
  <p>file as instruction from <a href="https://developers.google.com/android/guides/google-services-plugin" rel="noreferrer">this</a> link</p>
  
  <p>4.Replace empty string with <code>getString(R.string.default_web_client_id)</code></p>
  
  <p>Now I able to run the project and also able to take release build. But still,  Cannot resolve symbol default_web_client_id.</p>
  
  <p>Any update would be helpful...</p>
  
  <p>NB: Directly adding <code>oauth_client-&gt;client_id</code> will get an Error</p>
  
  <pre><code>W/GoogleActivity: Google sign in failed
      com.google.android.gms.common.api.ApiException: 12500: 
          at com.google.android.gms.common.internal.ApiExceptionUtil.fromStatus(Unknown Source) 
  </code></pre>