In the data import of sessions collection there is a document with a wrong field:
db.sessions.find({email: {$exists: true}});
{ “_id” : ObjectId(“5aca8f0a007c16793a79e670”), “email” : "magicz@cats.com", “jwt” : “someneatjwt” }
field should be “user_id” not “email”. Not really a problem, but misleading while debugging.