Server 102 can store the token in any suitable manner. For example, in some implementations, the token can be stored as a key in a key-value pair in association with an identifier of user device 108. As a more particular example, in some implementations, the token can be stored in association with information indicating the geographic location of user device 108 (e.g., based on Global Positioning Coordinates, and/or based on any other suitable information), an indication of an Internet Protocol (IP) address associated with user device 108, and/or any other suitable information. Note that, in some implementations, server 102 can use the stored token to maintain an ACL that indicates user devices allowed to communicate with the display device, where the stored token corresponds to and/or indicates the display device. For example, in some implementations, server 102 can add user devices to the ACL in response to receiving requests from user devices that include the stored token.