[WordPress Social Login] Post to a user's wall

I’m trying to post to a currently logged in Facebook user’s wall/timeline after clicking a button in my WordPress template file located in wp-content/themes/mytheme/mypage.php

I found this on the plugin authors github documentation:
https://miled.github.io/wordpress-social-login/developer-api-apis.html

I put the second snippet of code (the Facebook code) in my functions.php file.

Then on my wordpress template file: page.php, I did this:
apply_filters(‘wsl_hook_process_login_before_wp_set_auth_cookie’, get_current_user_id(), “Facebook”, ???);

The thing is, I have no idea what I need to put in place of **$hybridauth_user_profile** (hence the ???)

When I var_dump that variable:

global $hybridauth_user_profile;
echo “HELLO WORLD: “;
var_dump($hybridauth_user_profile);

It comes back as NULL in my template file (located in wp-content/themes/mytheme folder).

I also tried to just get the **access token** so I can just use the Facebook API directly from this document:
https://miled.github.io/wordpress-social-login/developer-api-snippets.html

Unfortunately same problem, no idea where to get this $hybridauth_user_profile variable.

All I really want to do is just post to a users Facebook timeline/wall after logging in via WordPress Social Login, but the documentation does not seem to be very specific about
– Where to run the code (do I even need to run apply_filters?)
– How to put in the correct arguments