Added validation and fixed errors

SchengenVisaApi/ApplicationLayer/Services/AuthServices/Requests/Validation/NameValidator.cs

@@ -0,0 +1,28 @@
+using Domains;
+using Domains.ApplicantDomain;
+using FluentValidation;
+
+namespace ApplicationLayer.Services.AuthServices.Requests.Validation
+{
+    public class NameValidator : AbstractValidator<Name>
+    {
+        public NameValidator()
+        {
+            RuleFor(m => m.FirstName)
+                .NotEmpty()
+                .WithMessage("First Name can not be empty")
+                .MaximumLength(ConfigurationConstraints.NameLength)
+                .WithMessage($"First Name length must be less than {ConfigurationConstraints.NameLength}");
+
+            RuleFor(m => m.Surname)
+                .NotEmpty()
+                .WithMessage("Surname can not be empty")
+                .MaximumLength(ConfigurationConstraints.NameLength)
+                .WithMessage($"Surname length must be less than {ConfigurationConstraints.NameLength}");
+
+            RuleFor(m => m.Patronymic)
+                .MaximumLength(ConfigurationConstraints.NameLength)
+                .WithMessage($"Patronymic length must be less than {ConfigurationConstraints.NameLength}");
+        }
+    }
+}