Can't agree with you more about Discord. It's a pain, and very seldom to I get any real answers there.
re: Keychain
I guess it's a matter of preference. I prefer it because I don't have to use my keys, and because I feel slightly safer doing it that way. Some people swear by it, others don't.
At any rate, you should be able to get into Hive-Engine regardless, or else they should specify.