Updates

SVSim.EmulatedEntrypoint/Controllers/SVSimController.cs

@@ -0,0 +1,19 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using SVSim.EmulatedEntrypoint.Security;
+
+namespace SVSim.EmulatedEntrypoint.Controllers
+{
+    /// <summary>
+    /// A base controller for SVSim with helpers for getting some values.
+    /// </summary>
+    [Route("api/[controller]")]
+    [ApiController]
+    public abstract class SVSimController : ControllerBase
+    {
+        /// <summary>
+        /// Returns the UdId of the user making the request. Can be null or empty, as only certain requests will send it. Known requests to send this value are: SignUp, CheckSpecialTitle, CheckiCloudUser, MigrateiCloudUser
+        /// </summary>
+        public string? UdId => Encryption.Decode(Request.Headers["UDID"]);
+    }
+}