Spotify technology

[Gonzalo V]

Hi everyone!
i need a guide or advice or anything.
I few years ago, i was able to connect to my music receiver via spotify app
from my phone or laptop. You had to connect to receiver and your laptop to
the same wifi network and this is. Years later, that service was deprecated
by spotify conditions. Spotify would only work with some brands, i can
understand that.
Do you know guys, how that technology works?,
it could be replicated via python app?,
Is there some kind a documentation that could help me?.
i cant find anything because i cant find the keyword to start my research
thanks in advance.
Gonzalo form Chile.

Saludos,
Gonzalo