Regarding to this question here "https://serverfault.com/questions/221760/multiple-public-keys-for-one-user" and many others on getting ssh access using multiple pub keys for one user, can I somehow add multiple keypairs to the authorized_keys folder inside the instance for the same user?
So the user can access the instance using any authorized keypair he is allowed to use to connect to the instance.
We did try adding a keypair to authorized_keys folder but we couldn't access the instance using that keypair.