@OnClick(R.id.btnSignUp) public void signUp() {

        String email = EmailEt.getText().toString().trim();
        String username = UsernameEt.getText().toString().trim();
        String password = PasswordEt.getText().toString().trim();
        String dateOfBirth = DateOfBirthEt.getText().toString();
        String gender = String.valueOf(GenderRg.getCheckedRadioButtonId());

        final String this_username = username;

        SyntonesWebAPI syntonesWebAPI = SyntonesWebAPI.Factory.getInstance(sContext);

        User user = new User();

        user.setUsername(username);
        user.setPassword(password);

        syntonesWebAPI.createUser(user);

        SyntonesWebAPI.Factory.getInstance(sContext).createUser(user).enqueue(new Callback<User>() {

            @Override
            public void onResponse(Call<User> call, Response<User> response) {
                UsernameTv.setText(this_username);
            }

            @Override
            public void onFailure(Call<User> call, Throwable t) {
                Log.e("Failed", t.getMessage());
            }
        });

    }