implementing just a single password potentially is a bad idea. if in the future u r trying to expand the app for multi users u will not be able to create users, so u cant set access permision. look up workgroup info files for further info on this.

ps
i am coding a security sys for my app at the minute which uses workgroup file and its prooving to be very hard as i cant find any good tutorials on it and the documentation isnt very good