URL    = "https://b24-ar17wx.bitrix24.by/rest/1/h0m...";
    ChatID = "chat" + "2056";

    Result = OPI_Bitrix24.GetChatMembersList(URL, ChatID);

    URL    = "b24-ar17wx.bitrix24.by";
    Token  = "8536b467006e9f06006b12e400000001000...";
    UserID = 10;

    Result = OPI_Bitrix24.GetChatMembersList(URL, UserID, Token);