With the advent of Firebird 3

Users who create databases must  be given that permission by SYSDBA.

However even to call the command ( listed below ) it seems you must already have a working connection to a database you cannot create using a client connection from another computer.database.

How do we get around this catch 22. 

ie. In order to create a database in Firebird 3 by a non SYSDBA user, a connection must be made and the CREATE DATABASE privilege must be granted. But on a clean firebird system there is no database to connect to.

How do you call:

GRANT CREATE DATABASE TO USER

without actually having a database connection