kinda works, but wasteful and misinforming :(

Kemkas.Web/Controllers/UserController.cs

@@ -0,0 +1,18 @@
+using Kemkas.Web.Db.Models;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Kemkas.Web.Controllers;
+
+[Route("api/[controller]")]
+[ApiController]
+public class UserController : ControllerBase
+{
+    // GET
+    [HttpGet("me")]
+    public async Task<string?> Me([FromServices] UserManager<ApplicationUser> userManager)
+    {
+        var user = await userManager.GetUserAsync(User);
+        return user?.UserName ?? user?.Email;
+    }
+}