🐛 Fix username bug for dev-env-tunnel

[devbyaccident]

Currently, when running in the chopd3bPrd account, the ssm-user is being used to login to the bastion instances after initial lookup, no matter who is opening the tunnel.

Running in AWS account: 684194535433
Opening Connection
getting info
Found instance i-0745968dfe012e78c. Connecting
ec2-ssh
INFO: Resolved instance name 'i-0745968dfe012e78c' to 'i-0745968dfe012e78c'
INFO: Using SSH key from SSH Agent, should be as good as any.
The authenticity of host 'i-0745968dfe012e78c (<no hostip for proxy command>)' can't be established.
ED25519 key fingerprint is SHA256:xzfSGQMR45GnYDkrlDCulT8qGuJXjUrjpuOQrr4nULk.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'i-0745968dfe012e78c' (ED25519) to the list of known hosts.
ssm-user@i-0745968dfe012e78c: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).