Some embodiments provide a method for a first device for joining a group of related devices. The method receives input of a password for authorization with a centralized entity. The method receives input of a code generated by a second device already established in the group of related devices. The method uses the password and the code to (i) join the group of related devices in order to synchronize user data with the devices in the group of related devices and (ii) authorize the first device with the centralized entity as a valid device for a particular account with the centralized entity.