OpenID Connect support (#3975)

Co-authored-by: DieselTech <30128380+DieselTech@users.noreply.github.com>
Co-authored-by: majora2007 <josephmajora@gmail.com>

API/Controllers/OidcController.cs

@@ -0,0 +1,37 @@
+using API.Extensions;
+using API.Services;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace API.Controllers;
+
+[Route("[controller]")]
+public class OidcController: ControllerBase
+{
+
+    [AllowAnonymous]
+    [HttpGet("login")]
+    public IActionResult Login(string returnUrl = "/")
+    {
+        var properties = new AuthenticationProperties { RedirectUri = returnUrl };
+        return Challenge(properties, IdentityServiceExtensions.OpenIdConnect);
+    }
+
+    [HttpGet("logout")]
+    public IActionResult Logout()
+    {
+
+        if (!Request.Cookies.ContainsKey(OidcService.CookieName))
+        {
+            return Redirect("/");
+        }
+
+        return SignOut(
+            new AuthenticationProperties { RedirectUri = "/login" },
+            CookieAuthenticationDefaults.AuthenticationScheme,
+            IdentityServiceExtensions.OpenIdConnect);
+    }
+
+}