My team shares a user account via a non-user shell on a few systems for reasons beyond our control. We all move our passphrase protected private keys to the share'd users ~/.ssh directory. We normally login and open an `ssh-agent` session then `ssh-add` our passphrase protected keys like below. None of us like this workflow and we're trying to make it easier.

Is there a way we can automatically be prompted for our passphrase when we open the shared user's shell?

```
sudo -u shared /bin/bash
# new shell opens
eval `ssh-agent -s`
ssh-add ~/.ssh/my_username_rsa
# enter passphrase and continue...

```