Remote Connection to phpMyAdmin DB in Droplet

I have set up my first Digital Ocean droplet and installed phpMyAdmin. I want to connect to a database in a Node JS app like so with the following credentials: const connection = mysql.createConnection({ user: , password: , host: , port: , database: , });

I’ve been following this article https://marketplace.digitalocean.com/apps/phpmyadmin

It gives an example of opening up a config file with vim, where i should enter the above details and gives an example. This might sound like a stupid question, but am i simply creating credentials from scratch, or are they specific things, like what should the host be? I’m new to database hosting, so i’m uncertain about this