我遇到令牌问题：
static final String GOOGLE_SCOPE_TAKE2 = "audience:server:client_id:";
static final String CLIENT_ID_WEB_APPS = "XXXXX.apps.googleusercontent.com";
static final String GOOGLE_ID_TOKEN_SCOPE = GOOGLE_SCOPE_TAKE2 + CLIENT_ID_WEB_APPS;
GoogleAuthUtil.getToken(ClientSideLoginActivity.this, accountName, String.format(GOOGLE_ID_TOKEN_SCOPE));
例外是Unknown