curl --location --request POST 'https://api.freedompay.uz/mfs/pay' \
--form 'pg_merchant_id=""' \
--form 'pg_payment_id="12345"' \
--form 'pg_abonent_phone="77077777777"' \
--form 'pg_payment_system_code="ALTELKZT"' \
--form 'pg_salt="some random string"' \
--form 'pg_sig=""'
<?xml version="1.0" encoding="UTF-8"?>
<root>
<pg_status>string</pg_status>
<pg_payment_id>0</pg_payment_id>
</root>