Add endpoint to access and modify user information.

Marechai.Data/Models/CreateUserRequest.cs

@@ -0,0 +1,24 @@
+using System.ComponentModel.DataAnnotations;
+using System.Text.Json.Serialization;
+
+namespace Marechai.Data.Models;
+
+public sealed record CreateUserRequest
+{
+    [Required]
+    [JsonPropertyName("userName")]
+    public string UserName { get; set; } = null!;
+    
+    [Required]
+    [EmailAddress]
+    [JsonPropertyName("email")]
+    public string Email { get; set; } = null!;
+    
+    [Required]
+    [MinLength(6)]
+    [JsonPropertyName("password")]
+    public string Password { get; set; } = null!;
+    
+    [JsonPropertyName("phoneNumber")]
+    public string? PhoneNumber { get; set; }
+}