IdHtp.Request.AcceptEncoding:='gzip, deflate';
    IdHTp.Request.BasicAuthentication:= true;
    IdHtp.Request.AcceptLanguage:='ru-RU,ru;q=0.9,en-US;q=0.8,en;q=0.7';
    IdHtp.Request.CacheControl:='max-age=0';
    IdHtp.Request.CustomHeaders.Values['Connection']     :='keep-alive';
    IdHtp.Request.ContentLength:=73;
    IdHtp.Request.ContentType:='application/x-www-form-urlencoded';    
    IdHtp.Request.Host:='url.ru';
    IdHtp.Request.CustomHeaders.Values['Origin']:='https:url.ru';
    IdHtp.Request.CustomHeaders.Values['Referer']:='https:url.ru';
    IdHtp.Request.CustomHeaders.Values['Sec-Fetch-Mode'] := 'navigate';
    IdHtp.Request.CustomHeaders.Values['Sec-Fetch-Site'] := 'ame-site';
    IdHtp.Request.CustomHeaders.Values['Sec-Fetch-User'] := '?1';
    IdHtp.Request.CustomHeaders.Values['Upgrade-Insecure-Requests'] := '1';
    IdHtp.Request.UserAgent := '....';

    PostData:=TStringlist.Create;
    PostData.Clear;

    PostData.Add('signin[login]=name);
    PostData.Add('signin[password]=password');
    
    Html:=IdHtp.Post(Url,PostData);