# Querying the Authentication Information of a Development Environment Instance

#### Function

This API is used to query the authentication information of a development environment instance, which is used to open the development environment instance.

#### URI

GET /v1/{project_id}/demanager/instances/{instance_id}/token

Table 1 describes the required parameters.

Table 1 Parameter description
Parameter | Mandatory | Type | Description
--- | --- | --- | ---
project_id | Yes | String | Project ID

instance_id

Yes

String

Instance ID It is the ID of the development environment instance you create. The instance ID is contained in the response code after the instance has been created. For details, see Creating a Development Environment Instance. If the development environment instance is created on the ModelArts management console, you can view the ID of the instance on the ModelArts management console.

#### Request Body

None

#### Response Body

Table 2 describes the response parameters.

Table 2 Parameter description
Parameter | Type | Description
--- | --- | ---
token | String | Authentication token

#### Samples

The following shows how to obtain the authentication token of instance 6fa459ea-ee8a-3ca4-894e-db77e160355e.

- Sample request

      GET https://endpoint/v1/{project_id}/demanager/instances/6fa459ea-ee8a-3ca4-894e-db77e160355e/token

- Successful sample response

      {
          "token": "7211546f57cd432790643bb6612da19d"
      }

- Failed sample response

      {
          "error_message": "The instance does not exist.",
          "error_code": "ModelArts.6309"
      }

#### Status Code

For details about the status code, see Status Code.

Parent topic: DevEnviron