src/Models/Social.php
public static function providers()
    {
        return collect(Settings::first()->fillable)->filter(function ($value) {
            return strpos($value, '_client_id') !== false;
        })->map(function ($value) {
            return str_replace('_client_id', '', $value);
        })->toArray();
    }
public static function providers()
    {
        return collect(Settings::first()->fillable)->filter(function ($value) {
            return strpos($value, '_client_id') !== false;
        })->map(function ($value) {
            return str_replace('_client_id', '', $value);
        })->toArray();
    }
Return all the providers supported.

@return array