URL    = "https://b24-ar17wx.bitrix24.by/rest/1/ps5...";
    ChatID = "1598";

    UserID = 10;

    Result = OPI_Bitrix24.DeleteUserFromChat(URL, ChatID, UserID);

    URL    = "b24-ar17wx.bitrix24.by";
    Token  = "a8e65667006e9f06006b12e400000001000...";
    ChatID = "1600";

    Result = OPI_Bitrix24.DeleteUserFromChat(URL, ChatID, UserID, Token);