# Assign user to order

Assigns a user to an order. If ANY of the orders within the array are not found, no orders will have a user assigned to them.

Endpoint: POST /orders/assignuser
Version: 1.0.0
Security: basicAuth

## Request fields (application/json):

  - `orderIds` (array, required)
    Array of order IDs to assign
    Example: [123456789,12345679]

  - `userId` (string, required)
    User GUID to assign to orders
    Example: "123456AB-ab12-3c4d-5e67-89f1abc1defa"

## Response 200 fields (application/json):

  - `success` (boolean)
    Example: true

  - `message` (string)
    Example: "User assigned successfully."

## Response 400 fields (application/json):

  - `message` (string)
    Example: "Invalid request parameters"

## Response 401 fields (application/json):

  - `message` (string)
    Example: "Invalid API credentials"

## Response 500 fields (application/json):

  - `message` (string)
    Example: "An internal error occurred"