Adds Database Structure in C# with Entity Framework

WatchLog/Data/Database/Global/User.cs

@@ -0,0 +1,32 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace WatchLog.Data
+{
+    public class User
+    {
+        [Key]
+        public int Id { get; set; }
+
+        [Required]
+        [MaxLength(100)]
+        public required string Name { get; set; }
+
+        [MaxLength(255)]
+        public string? Email { get; set; }
+
+        [Required]
+        public required string Password { get; set; } // Important: Save as HASH
+
+
+        // --- Navigation Properties ---
+        public virtual ICollection<PrivateEntity> PrivateEntities { get; set; } = new List<PrivateEntity>();
+
+        public virtual ICollection<GlobalEntity> GlobalEntities { get; set; } = new List<GlobalEntity>();
+
+        public virtual ICollection<Label> Labels { get; set; } = new List<Label>();
+
+        public virtual ICollection<UserWatchStatus> UserWatchStatuses { get; set; } = new List<UserWatchStatus>();
+
+        public virtual ICollection<LinkTableSharedUser> LinkTableSharedUsers { get; set; } = new List<LinkTableSharedUser>();
+    }
+}