move shared content to shared project

MareSynchronosServer/MareSynchronosShared/Models/Auth.cs

@@ -0,0 +1,14 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace MareSynchronosShared.Models
+{
+    public class Auth
+    {
+        [Key]
+        [MaxLength(64)]
+        public string HashedKey { get; set; }
+
+        public string UserUID { get; set; }
+        public User User { get; set; }
+    }
+}