A user store is the database where information of the users and/or user roles is stored. User information includes log-in name, password, first name, last name, e-mail etc.
All WSO2 products have an embedded H2 database except for WSO2 Identity Server, which has an embedded LDAP as its user store. Permission is stored in a separate database called the user management database, which by default is H2. However, users have the ability to connect to external user stores as well.