...

Shared/DTOs/CTicketDto.cs

@@ -9,7 +9,7 @@ namespace Shared.DTOs
 {
     public class CTicketDto
     {
-        public string CompanyID { get; set; }
+        public string? CompanyID { get; set; }
         [Required]
         public string Title { get; set; }
         [Required]

Shared/DTOs/CTicketNoAuthenticationDto.cs

@@ -10,8 +10,10 @@ namespace Shared.DTOs
     public class CTicketNoAuthenticationDto:CTicketDto
     {
         [Required]
+        [StringLength(11)]
         public string Mobile { get; set; }
         [Required]
+        [StringLength(5)]
         public string FullName { get; set; }
     }
 }

Shared/DTOs/VerificationCodeDto.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Shared.DTOs
+{
+    public class VerificationCodeDto
+    {
+        public string prm { get; set; }
+        public string val { get; set; }
+        public string Type { get; set; }
+    }
+}