Is your feature request related to a problem? Please describe.
I am attempting to set up branch previews (similar to Vercel) in railway. To do this, I need to update some environment variables on the railway side, including SUPABASE_DB_URL.

Describe the solution you'd like
I'd like to be able to run some supabase CLI command to obtain the DB_URl automatically, so I don't have to add it manually as a variable whenever I make a new branch. However, I cannot find a CLI command that will do this. gen keys gives me the password but not the user, the port, the database, or the host. branches get has the user, port, and host, but these conflict with the information shown in my dashboard. (I assume the database is always postgres?)

Describe alternatives you've considered
I've looked in the docs for the CLI and the javascript library, and neither of them seems to provide the database url. Any help is appreciated!