db and auth refactoring

Sledgemapper.Api/Core/Entities/Snapshot.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Sledgemapper.Api.Models
+{
+
+    public class Snapshot
+    {
+        [Key]
+        public int SnapshotId { get; set; }
+
+        [Required]
+        public int SessionId { get; set; }
+
+
+        [Required]
+        public string Object { get; set; }
+
+        [Required]
+        public double Timestamp { get; set; }
+    }
+}