Changing the listening port for fluidd

I'm trying to change the server listening port for fluidd and i know i need to edit the file in /etc/nginx/sites-available/fluidd but with the user 'biqu' i keep having permission denied. May i know what is the root password to log in?

Start by reviewing the issue's referenced /etc/nginx/sites-available/fluidd configuration and the project's existing guidance on permissions and account access. Done would require documenting a safe, supported way to change Fluidd's listening port without disclosing credentials; the issue names no tests or implementation entry point.

Written by the indexing model from the issue text.