Custom PostgreSQL Database Missing Username

We have a custom PostgreSQL database installed on the Mirth appliance. It did have a username, or database owner; however, in the Database Management section of the Mirth appliance web interface, the username has disappeared.



I am trying to connect to the database using pgAdmin, but without the username, I cannot connect to the server.



Is there a way to add the username back to the database?



Thanks.

Custom PostgreSQL Database Missing Username