Spotify授权api并订阅mailchimp

Question

Im trying to get people to authorize with spotify and then subscribe their email to a Mailchimp list.

I got two pieces of code that i need to tie together:

1. The spotify authorize (which works since i am able to make them follow a user)

         if($_SESSION['accessToken']){
   
         require 'vendor/autoload.php';
         $api = new SpotifyWebAPI\SpotifyWebAPI();
         $api->setAccessToken($_SESSION['accessToken']);
         $following = $api->followArtistsOrUsers('artist', '####');
         $me = $api->me();
         echo $me->email;
   

   At the end I retrieve the users e-mail adres with this piece of code that should be right:

$me = $api->me(); echo $me->email;

The second piece of code is the subscribe to mailchimp

1. mailchimp subscribe:

this one works, im able to subscribe [e-mail] to the right list.

<?php 
          $email = '[e-mail]';
          $list_id = '#####';
          $api_key = '####';

          $data_center = substr($api_key,strpos($api_key,'-')+1);

          $url = 'https://'. $data_center .'.api.mailchimp.com/3.0/lists/'. $list_id .'/members';

          $json = json_encode([
              'email_address' => $email,
              'status'        => 'subscribed', //pass 'subscribed' or 'pending'
          ]);

          $ch = curl_init($url);
          curl_setopt($ch, CURLOPT_USERPWD, 'user:' . $api_key);
          curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
          curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
          curl_setopt($ch, CURLOPT_TIMEOUT, 10);
          curl_setopt($ch, CURLOPT_POST, 1);
          curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
          curl_setopt($ch, CURLOPT_POSTFIELDS, $json);
          $result = curl_exec($ch);
          $status_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
          curl_close($ch);
          echo $status_code;
      }
   ?>

However, i seem to be unable to subscribe the e-mail retrieved from spotify to the mailchimplist using I tried:

if($_SESSION['accessToken']){      
require 'vendor/autoload.php';
      $api = new SpotifyWebAPI\SpotifyWebAPI();
      $api->setAccessToken($_SESSION['accessToken']);
      $following = $api->followArtistsOrUsers('artist', '####');
      $me = $api->me();
      echo $me->email;
$email = $me->email;
          $list_id = '#####';
          $api_key = '####';

etc. etc.

can you guys help me out?

Thank you! Sidenote: im just starting out with code, sorry for my rookie level :)