ECS CLI Install

Following the ECS CLI instructions, when I get to the step where you import the amazon ecs gpg public key, I run into the error:
"gpg: key BCE9D9A42D51784F: 1 signature not checked due to a missing key
gpg: key BCE9D9A42D51784F: "Amazon ECS ecs-security@amazon.com" not changed
gpg: Total number processed: 1
gpg: unchanged: 1"

I'm new to gpg so there's probably a very simple step I'm missing here. Any idea's on what I need to do differently to succesfully import the gpg public key?

Thanks!

Edited by: Andrew2021 on Sep 10, 2021 9:31 AM

Edited by: Andrew2021 on Sep 10, 2021 9:32 AM