Add project files.

CarParkValidationAPI/Authorization/JwtMiddleware.cs

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+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Options;
+using System.Linq;
+using System.Threading.Tasks;
+using CarParkValidationAPI.Models;
+using CarParkValidationAPI.Repository;
+using CarParkValidationAPI.Interface;
+namespace CarParkValidationAPI.Authorization
+{
+    public class JwtMiddleware
+    {
+        private readonly RequestDelegate _next;
+        private readonly AppSettings _appSettings;
+
+        public JwtMiddleware(RequestDelegate next, IOptions<AppSettings> appSettings)
+        {
+            _next = next;
+            _appSettings = appSettings.Value;
+        }
+
+        public async Task Invoke(HttpContext context, IUserService userService, IJwtUtils jwtUtils)
+        {
+            var token = context.Request.Headers["Authorization"].FirstOrDefault()?.Split(" ").Last();
+            var userId = jwtUtils.ValidateJwtToken(token);
+            if (userId != null)
+            {
+                // attach user to context on successful jwt validation
+                context.Items["User"] = userService.GetById(userId.Value);
+            }
+
+            await _next(context);
+        }
+    }
+}