Game is asking for cd key but when i check for it i couldnt find it

Hello, I'm running a translator, so please note that the sentence may be unfriendly. I recently bought this game, and I tried to download it and run it. (I also made an account) But they say they need an activation code. I heard you need to write this down to play the game, so I pressed the properties to find the code, but the code related button doesn't show up anywhere. Where on earth do I need to do this? Is my account the only way to find the code blocked?...

When i hit play on TTS it launches Ubisoft Connect asking for a activation code. I own the game on steam. Steam wont show me CD key for Siege or Siege TTS. Please help.

Hello, I recently received this game as a gift from a friend, installed it yesterday, registered, but I can't find the CD key for activation anywhere, please help

today i bought rainbow 6 siege and i donwloaded it. i logged into my account then it asked me for my "activation code". I checked my emails and i haven't gotten any even from when i bought the game. How do i get it?