How to log in to vk through a POST request?

Question

.NET

I'm trying to log in to vk through the form. I parsed the form, got the necessary fields. Next, I make a request through HttpClient:

Dictionary<string, string> parameters = new Dictionary<string, string>
            {
                {"email", userEmail},
                {"pass", userPassword},
                {"role", "al_frame"},
                {"_origin", "https://vk.com"},
                {"ip_h", ipH},
                {"lg_h", lgH},
                {"utf8", "1"},
                {"expire", ""},
                {"recaptcha", ""},
                {"captcha_sid", ""},
                {"captcha_key", ""}
            };
 
            FormUrlEncodedContent encodedContent = new FormUrlEncodedContent(parameters);
 
            CookieContainer cookies = new CookieContainer();
            //HttpClientHandler handler = new HttpClientHandler() { AllowAutoRedirect = false };
            //handler.CookieContainer = cookies;
 
            using (var handler = new HttpClientHandler() {
                CookieContainer = cookies,
                AllowAutoRedirect = true
            })
            using (HttpClient client = new HttpClient(handler))
            {
                Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
                Encoding.GetEncoding("windows-1251");
 
                //client.BaseAddress = new Uri(baseUrl);
                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/x-www-form-urlencoded"));
                client.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36");
                client.DefaultRequestHeaders.Add("Referer", "https://vk.com");
                client.DefaultRequestHeaders.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");
                HttpResponseMessage result = await client.PostAsync("https://login.vk.com/?act=login", encodedContent);
 
                CookieCollection cookiesResp = cookies.GetCookies(new Uri(baseUrl));
               
                foreach (Cookie cookie in cookiesResp)
                {
                    //Console.WriteLine(cookie.ToString());
                    cookies.Add(new Uri(baseUrl), cookie);
                }
 
                string resultContent = await result.Content.ReadAsStringAsync();
 
                Console.WriteLine(resultContent);
            }
 
            Console.ReadKey();

Nothing comes out of the output. The headers seem to be correct, and the following piece of js is given in the resultContent:

What can it be? How to win?
Sharps just started to study. Before that, I did exactly the same procedure in php, everything worked correctly there. Authorization is needed through the form, not through the API.