php oauth for github not working. What exactly?

I made a request to a github endpoint and got this error: I dont really know why

{"message":"Bad credentials","documentation_url":"https:\/\/docs.github.com\/rest"}

Heres the code:

 $accesstoken = Session::get('gitaccesstoken');
        $url = "https://api.github.com/user";
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
       
        $headers = [
          'Accept: application/vnd.github.v3+json, application/json',
          'User-Agent: http://127.0.0.1:8000/'
        ];
       
        if(Session::get('gitaccesstoken'))
          $headers[] = 'Authorization: Bearer '.$accesstoken;
       
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        
    $response = curl_exec($ch);
    return json_decode($response, true);