PostgreSQL users may need to be added to databases manually on Namecheap

I recently set up a PostgreSQL database on Namecheap's shared hosting platform. The cPanel interface allowed me to create the database and a user for it, but even after adding the user to the database my app was denied access to the tables. It seems that cPanel didn't actually grant the new user any permissions on the database. To do that, I had to go into phpPgAdmin, go to the database, switch to the Privileges section, and use the Grant link to grant the user privileges.