A method and system for managing accounts that control access to resources of different providers. The account management system allows providers to use a common logon procedure through an account management server. The account management system dynamically creates accounts when users request to access resources. To access to a resource, a user provides their credentials (e.g., user identifier and password) through a certain location (e.g., client computer) and identifies the resource (e.g., application). The account management system determines whether an account has already been created for those credentials. If not, the account management system authenticates the user, creates a new account for those credentials (i.e., registration), and associates the identified resource with the account.