> 1. Support a "Log everyone out" function by storing a simple version number in the JWT. If the version constant in your app is different to the number in the

> 1. Support a "Log everyone out" function by storing a simple version number in the JWT. If the version constant in your app is different to the number in the JWT, it is invalid. If you've got the iat property, you could just use that. i.e. anything issued before x time is invalid.