User reactions

userReactions.js

freezer.on('user:create', user => {
  freezer.get().users.set(user.id, user);
});

freezer.on('user:update', (id, update) => {
  freezer.get().users[id].set(update);
});

freezer.on('user:delete', id => {
  freezer.get().users.remove(id);
});