FormBody formBody = request.getFormBody()
                                    .add("date", date.getText().toString())
                                    .add("fromTime", fromTime.getSelectedItem().toString())
                                    .add("toTime", toTime.getSelectedItem().toString())
                                    .add("patient", String.valueOf(selectedPatientId))
                                    .build();
        request.doPost("addAppointment", formBody, AddAppointmentActivity.this, new Request.ResponseCallback() {
            @Override
            public void onResponse(final JSONObject jsonObject) {
                runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            String[][] checking = new String[][] {
                                    {"taken_appointment", getString(R.string.taken_appointment)},
                                    {"done", getString(R.string.added_appointment)},
                                    {"errors", Validation.getErrors(jsonObject)}
                            };
                            Validation.checkErrorsAndShowToast(AddAppointmentActivity.this, jsonObject, checking);
                        }
                });
            }

            @Override
            public void badUser() {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        UserSession.swithOnLogin(AddAppointmentActivity.this);
                    }
                });
            }
        });
    }