1. A method comprising: authenticating, by one or more processors of a machine, a first identifier of a user of a first server system that is configured to provide the user with conditional access to an application, the first server system being configured to provide, based on the first identifier, the user with conditional access to the application; accessing, by one or more processors of the machine, a data structure that maps the first identifier of the user to a second identifier of the user, a second server system being configured to provide, based on the second identifier, the user with conditional access to the application; accessing, by one or more processors of the machine, state data that corresponds to the user and specifies a non-default parameter of the application, the accessing of the state data being based on the first identifier being mapped to the second identifier by the data structure; and causing, by one or more processors of the machine, the second server system to instantiate the application based on the non-default parameter.