in the very top right, theres settings.

then: on the very left side theres "edit profile" and there is options like changing email and the annihilus account (type your ingame accountname in there).

you should see the gold immediatly ingame. You dont even have to restart the game.

also, the discord is way more active than the forum and alot of ppl are there that can help you too with sepcific problems or questions just click on the forum thread "discord" and youll be linked and invited to it.