TimeSpan converter for Swagger

1.JsonTimeSpanConverter.cs

using System;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace Core.Json.Converters
{
    public class JsonTimeSpanConverter : JsonConverter<TimeSpan>
    {
        public bool WithoutSeconds { get; init; }

        public override TimeSpan Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            var input = reader.GetString();

            if (string.IsNullOrWhiteSpace(input))
            {
                return default(TimeSpan);
            }

            return TimeSpan.Parse(input);
        }

        public override void Write(Utf8JsonWriter writer, TimeSpan value, JsonSerializerOptions options)
        {
            writer.WriteStringValue(
                WithoutSeconds
                    ? $"{value.Hours:D2}:{value.Minutes:D2}"
                    : value.ToString("c"));
        }
    }
}

2.JsonTimeSpanConverterAttribute.cs

using System;
using System.Text.Json.Serialization;
using Core.Json.Converters;

namespace Core.Json.Attributes
{
  [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false)]
  public class JsonTimeSpanConverterAttribute : JsonConverterAttribute
  {
    public bool WithoutSeconds { get; init; }

    public override JsonConverter CreateConverter(Type typeToConvert)
    {
      return new JsonTimeSpanConverter
      {
        WithoutSeconds = WithoutSeconds
      };
    }
  }
}

3.ServiceCollectionExtension.cs

public static void AddSwagger(this IServiceCollection services)
{
  services.AddSwaggerGen(c =>
  {
    c.MapType<TimeSpan>(() => new OpenApiSchema
    {
      Type = "string",
      Example = new OpenApiString("00:00:00")
    });
  }
}

4.DummyModel.cs

using System;
using System.Collections.Generic;
using Core.Json.Attributes;

namespace TimeSpanSwaggerConverter.Models
{
  public record DummyModel
  {
    public int Id { get; init; }
    public string Name { get; init; } = null!;
    [JsonTimeSpanConverter(WithoutSeconds = true)]
    public TimeSpan Time { get; init; }
    public bool IsActive { get; init; }
    public DateTime CreationDate { get; init; }
    public DateTime LastUpdateDate { get; init; }
  }
}