TopBraid Composer uses Eclipse secure storage system to store and retrieve database passwords. The passwords are stored through database wizards, SPARQLMotion database modules or from the menu at System > Add password to secure storage.... If the password was stored earlier, then there would be no need to specify it again in a wizard or database module. If the password is invalid or was not stored, then there would be a Password dialog prompting you to enter the new password for a given username and URL.