Add a cache system on the referential info

+ Add an identity service

Back/skydiveLogs-api.DomainBusiness/IdentityService.cs

@@ -0,0 +1,34 @@
+using skydiveLogs_api.Domain;
+using skydiveLogs_api.DomainBusiness.Interfaces;
+using System;
+using System.Linq;
+using System.Security.Claims;
+
+namespace skydiveLogs_api.DomainBusiness
+{
+    public class IdentityService : IIdentityService
+    {
+        #region Public Constructors
+
+        public IdentityService(ClaimsPrincipal user)
+        {
+            if (user != null
+                && user.Claims.Any())
+            {
+                var claims = user.Claims;
+
+                ConnectedUser = new User();
+                ConnectedUser.Login = claims.Single(c => c.Type == ClaimTypes.Name).Value;
+                ConnectedUser.Id = Convert.ToInt32(claims.Single(c => c.Type == ClaimTypes.UserData).Value);
+            }
+        }
+
+        #endregion Public Constructors
+
+        #region Public Properties
+
+        public User ConnectedUser { get; init; }
+
+        #endregion Public Properties
+    }
+}