Customize Feed doesnt work for facebook

Patch attached. Closing linked issue (spam detected).

Original function with problem ( $block_settings['user_token'] doesnt exist):
File: web\modules\contrib\socialfeed\src\Plugin\Block\FacebookPostBlock.php

 public function build() {
    $build = [];
    $items = [];
    $block_settings = $this->getConfiguration();
    try {
      if ($block_settings['override']) {
        $facebook = $this->facebook->createInstance($block_settings['app_id'], $block_settings['secret_key'], $block_settings['user_token'], $this->config->get('page_name'), NULL);
      }
      else {
        $facebook = $this->facebook->createInstance($this->config->get('app_id'), $this->config->get('secret_key'), $this->config->get('user_token'), $this->config->get('page_name'), NULL);
      }