* Managed API to handle User maintenance

* Managed Users view in application

FaKrosnoApi/Controllers/UsersController.cs

@@ -0,0 +1,52 @@
+using Microsoft.AspNetCore.Mvc;
+using OrdersManagementDataModel.Dtos;
+using OrdersManagementDataModel.Services;
+
+namespace FaKrosnoApi.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class UsersController(IUserService service) : Controller
+{
+    [HttpGet]
+    public async Task<ActionResult<IEnumerable<UserDto>>> GetAll()
+    {
+        IEnumerable<UserDto?> users = await service.GetAll();
+        return Ok(users);
+    }
+
+    [HttpGet("by-id")]
+    public async Task<ActionResult<UserDto?>> GetById([FromQuery] Guid id)
+    {
+        UserDto? user = await service.GetById(id);
+        return user != null ? Ok(user) : NotFound();
+    }
+
+    [HttpGet("by-username")]
+    public async Task<ActionResult<UserDto?>> GetByUsername([FromQuery] string username)
+    {
+        UserDto? user = await service.GetByUsername(username);
+        return user != null ? Ok(user) : NotFound();
+    }
+
+    [HttpPost]
+    public async Task<ActionResult<UserDto>> Add([FromBody] UserDto user)
+    {
+        await service.Add(user);
+        return Ok(user);
+    }
+
+    [HttpPut]
+    public async Task<ActionResult<UserDto>> Update([FromBody] UserDto user)
+    {
+        await service.Update(user);
+        return Ok(user);
+    }
+
+    [HttpDelete]
+    public async Task<ActionResult<UserDto>> Delete([FromQuery] Guid id)
+    {
+        await service.Delete(id);
+        return Ok();
+    }
+}