How to connect to DataBase (MySQL)? I want to make a desktop client for my Chat.
Godot doesn't support that feature currently.
But there are modules that allow you do so:
see this one: https://github.com/khairul169/gdsqlite
p.s. you should first search before asking. you would have found this topic:
How to connect to a database?
your question isn't that far of ;)
How to connect to DataBase (MySQL)?