public async Task <IActionResult> Create(ContragentCreateInputModel input)
        {
            if (this.ModelState.IsValid == false)
            {
                return(this.View(input));
            }

            var userId = this.usersService.GetUserIdBy(this.User.Identity.Name);

            if (userId == null)
            {
                return(this.NotFound());
            }

            await this.contragentsService.CreateAsync(input.Name, input.Address, input.Email, input.VatNumber, userId);

            return(this.RedirectToAction(nameof(All)));
        }
        public IActionResult Create()
        {
            var emptyContragentCreateInputModel = new ContragentCreateInputModel();

            return(this.View(emptyContragentCreateInputModel));
        }