How to start hass.io after stopping without SSH before?

I have a stupid beginners question:
I installed hass.io on raspberry pi 3+ as in the documentation, with SAMBA share, so I can access some required folders from my windows PC.
In hass.io I can restart hass.io, what I need to do often, after each small change of something in the configuration. But there is also a “stop server”. I will need to stop the service to do some maintenance in the database, and it looks like this is not possible until hass.io is connected to the datase.
But the question is: How I will restart hass.io later?
The web interface will not be available I think, SSH is not working, because it is not enabled. What is the recommended way? Should I reset the power then? But this can’t be the best way.
Should I install SSH before stopping the Service?

Yes, install the SSH add-on.

Hi. I “accidently” stoped hassio on RPi3. I clicked STOP instead of RESTART. I can’t log in with SSH to Pi or HA. I can access server via Samba.
Any suggestions how to restart it or i need to start from scratch.
When try to login via SSH it come back with: “No Supported auhorisation methods available (server sent: publickey, keyboard-interactive)”.

Any help appriciated.