curl --request GET \
  --url https://staging.api.commercengine.io/api/v1/{store_id}/storefront/pos/users/{id} \
  --header 'Authorization: Bearer <token>'

{
  "message": "<string>",
  "success": true,
  "content": {
    "user": {
      "id": "<string>",
      "first_name": "<string>",
      "last_name": "<string>",
      "phone": "<string>",
      "email": "jsmith@example.com",
      "channel": {
        "id": "<string>",
        "name": "<string>"
      },
      "device": {
        "id": "<string>",
        "name": "<string>"
      },
      "location": {
        "id": "<string>",
        "name": "<string>"
      },
      "roles": [
        {
          "location_id": "<string>",
          "location_name": "<string>",
          "role_id": "<string>",
          "role_name": "<string>"
        }
      ]
    }
  }
}