# 1. Check existing user

<figure><img src="/files/XmdN55gwjGkcPNcOvJVr" alt=""><figcaption></figcaption></figure>

## **Description**

ตรวจสอบว่าผู้ใช้งานที่ร้องขอ มีอยู่ในระบบของท่านแล้วหรือยัง?

Check if the user who made the request already exists in your system.

## **Endpoint URL**

`GET` /  `endpoint-tch/check-`existing`-user/{userId}`&#x20;

(สามารถตั้งชื่อ endpoint url เป็นชื่ออื่นได้; You can name the endpoint URL something else if desired.)

## **Request Parameters**

* **userId** (string, required): รหัสผู้ใช้งานที่ต้องการตรวจสอบ (The user ID you want to verify.)

### **Success Response**

* **HTTP Status Code**: `200`
* **Structure**:

  ```typescript
  {
    "status": "success",
    "code" : 200,
    "message": "User already exist.",
    "data": {
      "is_available": boolean (true | false)
      //true = The user exists.
      //false = The user does not exist and must be created.
    }
  }
  ```

### **Error Responses**

* **500 Internal Server Error**: error นอกเหนือจากที่กำหนดไว้ เช่น error try catch (Errors other than those specified, such as try-catch errors.)

  ```typescript
  {
    "status": "error",
    "code": 500,
    "message": string,
  }
  ```


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