public async Task Execute(Input input)
        {
            var user = new IdentityUser
            {
                UserName    = input.UserName,
                Email       = input.Email,
                PhoneNumber = input.PhoneNumber
            };

            var Email = await AuthenticationRepository.FindByEmail(input.Email);

            var Username = await AuthenticationRepository.FindByName(input.UserName);

            var Phone = await AuthenticationRepository.FindByPhoneNumber(input.PhoneNumber);

            if (Email != null)
            {
                OutputHandler.Error("Email Already Exist");
            }
            if (Username != null)
            {
                OutputHandler.Error("Username Already Exist");
            }
            if (Phone != null)
            {
                OutputHandler.Error("Phone number Already Exist");
            }
            else
            {
                var result4 = await AuthenticationRepository.Createuser(user, input.password);

                OutputHandler.Handle(new Output("Registraction Successful.."));
            }
        }
        public async Task Execute(Input input)
        {
            var r1 = new Regex(@"^([0-9a-zA-Z]([-\.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$");
            var r2 = new Regex(@"^([0-9]{10})$");

            if (!string.IsNullOrEmpty(input.UserName) && r1.IsMatch(input.UserName))
            {
                //var result1 = userManager.Users.SingleOrDefault(r => r.Email == model.UserName);

                //return await logincheck(result1, model.password);

                var result1 = await AuthenticationRepository.FindByEmail(input.UserName);

                if (result1 == null)
                {
                    OutputHandler.Error("Email not Found");
                }
                else
                {
                    var output = await logincheck(result1, input.Password);

                    OutputHandler.Handle(new Output(output.ToString()));
                }
            }
            else if (!string.IsNullOrEmpty(input.UserName) && r2.IsMatch(input.UserName))
            {
                //var result2 = userManager.Users.SingleOrDefault(r => r.PhoneNumber == model.UserName);

                //return await logincheck(result2, model.password);

                var result2 = await AuthenticationRepository.FindByPhoneNumber(input.UserName);

                if (result2 == null)
                {
                    OutputHandler.Error("PhoneNumber Not Found");
                }
                else
                {
                    var output1 = await logincheck(result2, input.Password);

                    OutputHandler.Handle(new Output(output1.ToString()));
                }
            }
            else
            {
                var result3 = await AuthenticationRepository.FindByName(input.UserName);

                if (result3 == null)
                {
                    OutputHandler.Error("UserName not Found");
                }
                else
                {
                    var output2 = await logincheck(result3, input.Password);

                    OutputHandler.Handle(new Output(output2.ToString()));
                }
            }
        }