How to get password from rom-0 file?

Configurations from certain ZyNOS based devices like ZyXEL P-662H, Huawei HG530, TP-Link TD-W8901N, etc. are exported in rom-0 format.
Identify different fields in rom-0 file and decompress LZS compressed data to get the admin password.

[@janbeck8269]

Another nice one. Thanks

[@Arian-Ices]

Bro I. Need you help