asp.net/winforms login; uml managers, repositories pages edited

StudentHouseDashboard/WinForms/Login.cs

@@ -0,0 +1,27 @@
+using StudentHouseDashboard.Managers;
+using StudentHouseDashboard.Models;
+
+namespace WinForms
+{
+    public partial class Login : Form
+    {
+        public Login()
+        {
+            InitializeComponent();
+        }
+
+        private void btnLogin_Click(object sender, EventArgs e)
+        {
+            UserManager userManager = new UserManager();
+            User? user = userManager.AuthenticatedUser(tbUsername.Text, tbPassword.Text);
+            if (user == null)
+            {
+                MessageBox.Show("Wrong username or password", "Login failed", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+            else
+            {
+                MessageBox.Show($"Welcome, {user.Name}", "Login successful", MessageBoxButtons.OK, MessageBoxIcon.Information);
+            }
+        }
+    }
+}