curl --request GET \
  --url https://api.pingproxies.com/1.0/public/user/proxy_user/search \
  --header 'X-API-Private-Key: <api-key>' \
  --header 'X-API-Public-Key: <api-key>'

{
  "data": [
    {
      "customer_id": 1955,
      "ip_address_authentications": [
        "17.172.224.47"
      ],
      "proxy_user_creation_datetime": "2023-09-28 12:34:56",
      "proxy_user_id": "stevejobs",
      "proxy_user_ip_address_authentication_limit": 3,
      "proxy_user_is_default": false,
      "proxy_user_is_deleted": false,
      "proxy_user_is_service_restricted": false,
      "proxy_user_is_strict_security": false,
      "proxy_user_last_update_datetime": "2023-09-28 12:34:56",
      "proxy_user_metadata": {
        "resell_order_id": "APPL-9876-5432"
      },
      "proxy_user_password": "apple1984",
      "proxy_user_residential_bytes_limit": 134142432,
      "proxy_user_residential_bytes_used": 31223,
      "restricted_service_ids": [
        "111-230-892"
      ]
    }
  ],
  "item_count": 1,
  "message": "Proxy User search successful.",
  "page": 1,
  "per_page": 10,
  "total_count": 1
}