WebAPISignalRChat/Backend/Diligent.WebAPI.Host/Mediator/Authentication/Handlers/AddRoleHandler.cs

using Diligent.WebAPI.Data.Entities;
using Diligent.WebAPI.Host.Mediator.Authentication.Commands;
using MediatR;
using Microsoft.AspNetCore.Identity;
using System.Web.Http.ModelBinding;

namespace Diligent.WebAPI.Host.Mediator.Authentication.Handlers
{
    public class AddRoleHandler : IRequestHandler<AddRoleCommand, Unit>
    {
        private readonly RoleManager<Roles> _roleManager;

        public AddRoleHandler(RoleManager<Roles> roleManager)
        {
            _roleManager = roleManager;
        }
        public async Task<Unit> Handle(AddRoleCommand request, CancellationToken cancellationToken)
        {
            await _roleManager.CreateAsync(new Roles() { Name = request.NameOfRole });

            return new Unit();
        }
    }
}