A method for registering user identification data in an application service provider data repository is provided, where the application service provider provides web services for a plurality of customers, each customer having a plurality of users with respective user identification data. The method includes receiving user identification data from one of the users through a website associated with one of the plurality of customers, retrieving customer identification data based on a uniform resource locator assigned to the website, concatenating the user identification data and customer identification data to create a user key, and registering a user account within the data repository based on the created user key.