A computing device generates a link between a first user account and a second user account. The computing device logs in in an application or service using the first user account. The computing device receives a request to modify a state of a network-accessible device associated with the second user account. The computing device determines, based on the link, that the application or service has access to the network-accessible device. The computing device then causes the state of the network-accessible device to be modified in accordance with the request.