WIP: Project setup with .NET backend and Next.js frontend

backend/Models/User.cs

@@ -0,0 +1,35 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace RacePlannerApi.Models;
+
+public class User
+{
+    [Key]
+    public Guid Id { get; set; } = Guid.NewGuid();
+
+    [Required]
+    [EmailAddress]
+    public string Email { get; set; } = string.Empty;
+
+    [Required]
+    public string PasswordHash { get; set; } = string.Empty;
+
+    [Required]
+    [MaxLength(100)]
+    public string Name { get; set; } = string.Empty;
+
+    [Required]
+    public UserRole Role { get; set; } = UserRole.Participant;
+
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    // Navigation properties
+    public ICollection<Event> OrganizedEvents { get; set; } = new List<Event>();
+    public ICollection<Registration> Registrations { get; set; } = new List<Registration>();
+}
+
+public enum UserRole
+{
+    Participant,
+    Organizer
+}