Add project files.

ConfigurationPannel/Pages/Login.cshtml.cs

@@ -0,0 +1,53 @@
+using System.Security.Claims;
+using ConfigurationPannel.Services;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace ConfigurationPannel.Pages;
+
+public class LoginModel : PageModel
+{
+    private readonly UserService _userService;
+
+    public LoginModel(UserService userService)
+    {
+        _userService = userService;
+    }
+
+    [BindProperty]
+    public string Username { get; set; } = string.Empty;
+
+    [BindProperty]
+    public string Password { get; set; } = string.Empty;
+
+    public string ErrorMessage { get; set; } = string.Empty;
+
+    public void OnGet()
+    {
+    }
+
+    public async Task<IActionResult> OnPostAsync()
+    {
+        if (await _userService.ValidateCredentialsAsync(Username, Password))
+        {
+            var claims = new List<Claim>
+            {
+                new Claim(ClaimTypes.Name, Username)
+            };
+
+            var identity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
+            var principal = new ClaimsPrincipal(identity);
+
+            await HttpContext.SignInAsync(
+                CookieAuthenticationDefaults.AuthenticationScheme,
+                principal);
+
+            return RedirectToPage("/Configure");
+        }
+
+        ErrorMessage = "Invalid username or password";
+        return Page();
+    }
+}