public async Task SendMailForOwnership(Book book, User user, string emailMessage) { var emailMessageForBookActivated = new RequestMessage() { UserName = user.FirstName + " " + user.LastName, BookName = book.Name, BookId = book.Id, UserAddress = new MailboxAddress($"{user.Email}"), }; await _emailSenderService.SendForOwnershipAsync(emailMessageForBookActivated, emailMessage); }