diff --git a/Klient/Klient/Klient.Android/MainActivity.cs b/Klient/Klient/Klient.Android/MainActivity.cs
index 18b0cb6..1df438a 100644
--- a/Klient/Klient/Klient.Android/MainActivity.cs
+++ b/Klient/Klient/Klient.Android/MainActivity.cs
@@ -7,12 +7,19 @@ using Android.Views;
 using Android.Widget;
 using Android.OS;
 using Xamarin.Essentials;
-
+using System.Net.Http;
+using System.Collections.Generic;
+using System.Security;
+using System.Net;
+using System.Linq;
+
 namespace Klient.Droid
 {
     [Activity(Label = "Klient", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
     public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
     {
+        private static readonly HttpClient client = new HttpClient();
+
         protected override void OnCreate(Bundle savedInstanceState)
         {
             base.OnCreate(savedInstanceState);
@@ -24,7 +31,29 @@ namespace Klient.Droid
         [Java.Interop.Export("In")]
         async public void SignIn(View v)
         {
+            var Login = FindViewById<EditText>(Resource.Id.Login).Text;
+            SecureString Password = new NetworkCredential("", FindViewById<EditText>(Resource.Id.Password).Text).SecurePassword;
 
+            if(Login.Length < 3 || Login.Length > 12)
+            {
+                SetContentView(Resource.Layout.ekranLogowania);
+            }
+            if(string.IsNullOrWhiteSpace(new NetworkCredential("", Password).Password))
+            {
+                SetContentView(Resource.Layout.ekranLogowania);
+            }
+
+            var values = new Dictionary<string, string>
+            {
+                { "login", Login },
+                { "password", new NetworkCredential("", Password).Password }
+            };
+
+            var content = new FormUrlEncodedContent(values);
+
+            var response = await client.PostAsync("https://localhost:44371/api/User/SignIn", content);
+
+            var responseString = await response.Content.ReadAsStringAsync();
         }
 
         [Java.Interop.Export("Reset")]
@@ -36,7 +65,32 @@ namespace Klient.Droid
         [Java.Interop.Export("SignUp")]
         async public void SignUp()
         {
+            var Name = FindViewById<EditText>(Resource.Id.Name).Text;
+            var Surname = FindViewById<EditText>(Resource.Id.Surname).Text;
+            var Email = FindViewById<EditText>(Resource.Id.Email).Text;
+            var Login = FindViewById<EditText>(Resource.Id.NewLogin).Text;
+            SecureString Password = new NetworkCredential("", FindViewById<EditText>(Resource.Id.NewPassword).Text).SecurePassword;
+            SecureString Password2 = new NetworkCredential("", FindViewById<EditText>(Resource.Id.RepeatPassword).Text).SecurePassword;
 
+            if(new NetworkCredential("", Password).Password != new NetworkCredential("", Password2).Password)
+            {
+                SetContentView(Resource.Layout.ekranRejestracji);
+            }
+
+            var values = new Dictionary<string, string>
+            {
+                { "email", Email },
+                { "name", Name },
+                { "surname", Surname },
+                { "login", Login },
+                { "password", new NetworkCredential("", Password).Password }
+            };
+
+            var content = new FormUrlEncodedContent(values);
+
+            var response = await client.PostAsync("https://localhost:44371/api/User/Register", content);
+
+            var responseString = await response.Content.ReadAsStringAsync();
         }
 
         [Java.Interop.Export("HelpLoginScreen")]
diff --git a/Klient/Klient/Klient.Android/Poszukiwacz.csproj b/Klient/Klient/Klient.Android/Poszukiwacz.csproj
index 51e91df..6b57764 100644
--- a/Klient/Klient/Klient.Android/Poszukiwacz.csproj
+++ b/Klient/Klient/Klient.Android/Poszukiwacz.csproj
@@ -51,6 +51,7 @@
     <Reference Include="Mono.Android.Export" />
     <Reference Include="System" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Net.Http" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Xml" />
   </ItemGroup>