maicol07 My config file in /wp-content/plugins/flarum-sso/config.php
..of course mysite i replace with my domain and myflarum with my flarum name.
<?php
return (object) [
// URL to your Flarum forum
'flarum_url' => 'https://myflarum.mysite.com',
// Domain of your main site (without http://)
'root_domain' => 'mysite.com',
// Create a random key in the api_keys table of your Flarum forum
'flarum_api_key' => 'keywith40characters',
// Random token to create passwords
'password_token' => 'keywith40characters',
// How many days should the login be valid
'lifetime_in_days' => 14,
];