MySQL Shell (mysqlsh) connection not working [SOLVED]

[MagePsycho]

I installed MySQL Shell(mysqlsh) on my MacBook and attempted to connect to a database running in a Warden container.
However, it isn’t working, and I’m encountering the following error:

MySQL Error 2005: No such host is known '_db_1'

Has anyone successfully connected to a Warden database using MySQL Shell?

UPDATED
I was not using SSL tunneling for the connection. Using it results in a different error:

Creating a Classic session to 'magento@_db_1:3306'
Existing SSH tunnel found, connecting...
Error opening MySQL session through SSH tunnel: Lost connection to MySQL server at 'reading initial communication packet', system error: 0 (MySQL Error 2013)

UPDATED
It's solved by using the connection as (in JS mode):

shell.connect({uri:"mysql://magento:magento@<project>-db-1:3306", ssh:"[email protected]:2222", "ssh-identity-file":"~/.warden/tunnel/ssh_key"})

To connect in SQL mode

\c mysql://magento:magento@<project>-db-1:3306 --ssh "[email protected]:2222" --ssh-identity-file ~/.warden/tunnel/ssh_key