来自Discord API的响应“此字段是必需的”

Question

我必须在PHP中为我的应用程序使用Discord API。我有OAuth2令牌和机器人令牌，并且我想通过API将成员添加到公会。我遇到错误object(stdClass)#24 (1) { ["access_token"]=> array(1) { [0]=> string(22) "This field is required" } }

我的代码：

curl_setopt_array($request, [
                            CURLOPT_URL => "https://discordapp.com/api/guilds/[id]/members/" . $user->id,
                            CURLOPT_CUSTOMREQUEST => "PUT",
                            CURLOPT_POSTFIELDS => [
                                "access_token" => $access_token, // oauth2 access token
                            ],
                            CURLOPT_HTTPHEADER => [
                                "Authorization: Bot [token]", //bot token
                                "Content-Type: application/json",
                            ],
                            CURLOPT_RETURNTRANSFER => true,
                        ]);

我不理解错误This field is required，因为我将其发送给他们。有人知道哪里出问题了吗？ ;（