//Facebook is not fully compatible with OAuth 2.0 draft 10, access token response is
//application/x-www-form-urlencoded, not json encoded so we use dedicated response class for that
//Own response class is an easy way to deal with oauth providers that introduce modifications to
//OAuth specification
GitHubTokenResponse oAuthResponse = oAuthClient.accessToken(request, GitHubTokenResponse.class);
System.out.println(
"Access Token: " + oAuthResponse.getAccessToken() + ", Expires in: " + oAuthResponse
.getExpiresIn());
} catch (OAuthProblemException e) {
System.out.println("OAuth error: " + e.getError());
System.out.println("OAuth error description: " + e.getDescription());
}