keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN) .requestIdToken(serverClientId) .requestEmail() .build();
GoogleIdTokenVerifier verifier = new GoogleIdTokenVerifier.Builder(transport, jsonFactory) .setAudience(Arrays.asList(serverClientId)) .setIssuer("https://accounts.google.com") .build();
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN) .requestScopes(new Scope(Scopes.DRIVE_APPFOLDER)) .requestServerAuthCode(serverClientId) .requestEmail() .build();
GoogleClientSecrets clientSecrets = GoogleClientSecrets.load( JacksonFactory.getDefaultInstance(), new FileReader(PATH_TO_CLIENT_SECRET_FILE));
