@Shard if I'm not mistaken the session sharing plugin allows you to create users in YOUR application and then share them into nodebb. I'm not sure about the OP but I'm working on the reverse solution. Given the great user management/profile system in nodebb, I want to leverage that and then just share that user into my application.
There's a jwt plugin that should expose a jwt which can then be used in a non-nodebb app. Unfortunately it isn't in acp and it looks like it isn't up to date. It doesn't show up after being activated and the dev log reports that the plugin may not work with the current version of nodebb.
I'm going to spend a little time trying to get it updated. I think there's a lot of value in this because of how robust the entire user system is in nodebb.