public string Run(RequestSender requestSender, ILoggerService log)
        {
            string welcome = "  Edit Clients info service.";

            log.Info(welcome);
            Console.WriteLine(welcome); // signal about enter into case

            int    id          = 0;
            string lastName    = string.Empty,
                   firstName   = string.Empty,
                   phoneNumber = string.Empty;

            string inputString = string.Empty;

            while (inputString != "e")
            {
                if (id == 0)
                {
                    Console.Write("   Enter the Id of client: ");
                    inputString = Console.ReadLine();
                    log.Info($"Id of client input: {inputString}");
                    int inputInt;
                    int.TryParse(inputString, out inputInt);
                    if (!StockExchangeValidation.checkId(inputInt))
                    {
                        continue;
                    }
                    id = inputInt;
                }

                if (string.IsNullOrEmpty(lastName))
                {
                    Console.Write("   Enter the Last name of client: ");
                    inputString = Console.ReadLine();
                    log.Info($"Last name input: {inputString}");
                    if (!StockExchangeValidation.checkClientLastName(inputString))
                    {
                        continue;
                    }
                    lastName = inputString;
                }

                if (string.IsNullOrEmpty(firstName))
                {
                    Console.Write("   Enter the First name of client: ");
                    inputString = Console.ReadLine();
                    log.Info($"First name input: {inputString}");
                    if (!StockExchangeValidation.checkClientFirstName(inputString))
                    {
                        continue;
                    }
                    firstName = inputString;
                }

                if (string.IsNullOrEmpty(phoneNumber))
                {
                    Console.Write("   Enter the phone number of client: ");
                    inputString = Console.ReadLine();
                    log.Info($"Phone number input: {inputString}");
                    if (!StockExchangeValidation.checkClientPhoneNumber(inputString))
                    {
                        continue;
                    }
                    phoneNumber = inputString;
                }

                break;
            }

            if (inputString == "e")
            {
                string exitString = "Exit from registration";
                log.Info(exitString);
                return(exitString);
            }

            Console.WriteLine("    Wait a few seconds, please.");

            var clientInputData = new ClientInputData
            {
                Id          = id,
                LastName    = lastName,
                FirstName   = firstName,
                PhoneNumber = phoneNumber
            };

            log.Info($"Created ClientInputData with Id = {id}, LastName = {lastName}, FirstName = { firstName}, PhoneNumber = { phoneNumber}");

            var reqResult = requestSender.EditClient(clientInputData);

            log.Info($"Request result: {reqResult}.");
            if (string.IsNullOrWhiteSpace(reqResult))
            {
                return($"     Client with Id = {id} was changed! Press Enter.");
            }
            return("Error. Client wasn't edited! Press Enter.");
        }