How do i retrieve the user if all I have is the accessToken

[Olabayo]

My use case is retrieve accessToken from mobile app, which is sent to the server and server confirms the token by querying facebook graph api with the accessToken. Your code assumes I already have the user id, on mobile app all I do is retrieve accessToken which is fine because I want the server to validate the token and continue from there.

[vooolll]

@Olabayo Do you mean your want to retrieve data of your current user ?

[Olabayo]

@vooolll Yes without having a user id, by using the accessToken.

Pulled from the facebook php sdk

$fb = new Facebook\Facebook([ 'app_id' => '{app-id}', 'app_secret' => '{app-secret}', 'default_graph_version' => 'v4.0', ]);

// Notice I can retrieve a user without requiring a user id as long as I have his accessToken try { // Returns a Facebook\FacebookResponse object $response = $fb->get('/me?fields=id,name', '{access-token}'); } catch(Facebook\Exceptions\FacebookResponseException $e) { echo 'Graph returned an error: ' . $e->getMessage(); exit; } catch(Facebook\Exceptions\FacebookSDKException $e) { echo 'Facebook SDK returned an error: ' . $e->getMessage(); exit; }

$user = $response->getGraphUser();

echo 'Name: ' . $user['name'];

[vooolll]

@Olabayo oh, it is easy to solve just pass FacebookUserId("me") instead of FacebookUserId("someid"), and you will get your user, https://github.com/vooolll/facebook4s/blob/master/docs/user.md