# Querying MFA Device Information of Users

#### Function

This API is provided for the administrator to query the MFA device information of users.

#### URI

GET /v3.0/OS-MFA/virtual-mfa-devices

#### Request Parameters

Table 1 Parameters in the request header
Parameter | Mandatory | Type | Description
--- | --- | --- | ---
X-Auth-Token | Yes | String | Token with Security Administrator permissions.

#### Response Parameters

Table 2 Parameters in the response body
Parameter | Type | Description
--- | --- | ---
virtual_mfa_devices | Array of objects | Virtual MFA device information.

Table 3 virtual_mfa_devices
Parameter | Type | Description
--- | --- | ---
serial_number | String | Virtual MFA device serial number.
user_id | String | User ID.

#### Example Request

    GET https://sample.domain.com/v3.0/OS-MFA/virtual-mfa-devices

#### Example Response

Status code: 200

The request is successful.

    {
      "virtual_mfa_devices" : [
              {
                  "user_id" : "16b26081f43d4c628c4bb88cf32e9...",
                  "serial_number" : "iam/mfa/16b26081f43d4c628c4bb88cf32e9..."
                },
               {
                  "user_id" : "47026081f43d4c628c4bb88cf32e9...",
                  "serial_number" : "iam/mfa/75226081f43d4c628c4bb88cf32e9..."
                 }
              ]
    }

Status code: 403

Access denied.

- Example 1

    {
       "error_msg" : "You are not authorized to perform the requested action.",
       "error_code" : "IAM.0002"
     }

- Example 2

    {
       "error_msg" : "Policy doesn't allow %(actions)s to be performed.",
       "error_code" : "IAM.0003"
     }

Status code: 404

The requested resource cannot be found.

    {
      "error_msg" : "Could not find %(target)s: %(target_id)s.",
      "error_code" : "IAM.0004"
    }

Status code: 500

Internal server error.

    {
      "error_msg" : "An unexpected error prevented the server from fulfilling your request.",
      "error_code" : "IAM.0006"
    }

#### Status Codes

Status Code | Description
--- | ---
200 | The request is successful.
401 | Authentication failed.
403 | Access denied.
404 | The requested resource cannot be found.
500 | Internal server error.

Parent topic: User Management