Discord basic send message and member list

Discord.php

<?php

class Discord
{
    protected $token = "";
    protected $guidId = "";
    protected $endpoint = "https://discord.com/api/v8";

    public function post($query, $data = null)
    {
        $curl = curl_init();
        curl_setopt_array($curl, array(
            CURLOPT_URL => $this->endpoint . $query,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_ENCODING => "",
            CURLOPT_MAXREDIRS => 10,
            CURLOPT_TIMEOUT => 0,
            CURLOPT_POSTFIELDS => json_encode($data),
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
            CURLOPT_CUSTOMREQUEST => "POST",
            CURLOPT_HTTPHEADER => array(
                "Authorization: Bot " . $this->token,
                'Content-Type:application/json'
            ),
        ));


        $response = curl_exec($curl);
        curl_close($curl);
        return json_decode($response);
    }

    public function get($query)
    {
        $curl = curl_init();
        curl_setopt_array($curl, array(
            CURLOPT_URL => $this->endpoint . $query,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_ENCODING => "",
            CURLOPT_MAXREDIRS => 10,
            CURLOPT_TIMEOUT => 0,
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
            CURLOPT_CUSTOMREQUEST => "GET",
            CURLOPT_HTTPHEADER => array(
                "Authorization: Bot " . $this->token,
            ),
        ));

        $response = curl_exec($curl);
        curl_close($curl);
        return json_decode($response);
    }

    public function getMemberList()
    {
        return $this->get("/guilds/" . $this->guidId . "/members?limit=50");
    }

    public function getUserDms($recipientId)
    {
        return $this->post("/users/@me/channels", ['recipient_id' => $recipientId]);
    }

    public function sendMessage($recipientId, $content)
    {
        $dm = $this->getUserDms($recipientId);
        return $this->post("/channels/" . $dm->id . "/messages", ["content" => $content]);
    }

    public function getMemberArray()
    {
        $members = $this->getMemberList();
        $users = [];
        foreach ($members as $mem) {
            $users[$mem->user->id] = $mem->user->username . "#" . $mem->user->discriminator;
        }
        return $users;
    }
}