how to write a multiplayer game in unity code example

Example: how do i make multiplayer in unity

Since unity multiplay is now obsolete, here are some helpful resources:
https://www.photonengine.com/pun - The multiplayer engine
https://www.youtube.com/channel/UCyoayn_uVt2I55ZCUuBVRcQ - A channel that can teach you how to make a basic game

Everything u need can be found on YouTube