PeerSpot users agreed that functionality is of utmost importance to a quality Open Source Database (OSD). The specifications will change depending on the task you are trying to accomplish, but any Open Source Database needs to be solidly functional or there is nothing to work with. On an individual basis, scalability, metrics, and security are important features to look for. Users were clear that the efficiency of the medium which will connect the OSD with the application running it is...
I would recommend Redis as session information caching is one of the major use cases.
Either you can go for Firebase or Redis..both are suitable to store the sessions and token info
I think Redis works very well for session cache.