Shared folder not visible for existing users in Jupyterhub UI

Question

I have installed jupyterhub in my servers and I have created multiple users and everything works fine. The login page in jupyterhub lands in /home directory. However I want to create a shared folder where users can share their notebooks, files with other users. I have created a group for users and a shared folder with permissions in /opt/shared. I want this directory to be visible in jupyterhub landing page.

I initially tried changing the c.Spawner.notebook_dir to /opt but this will allow all users to see the files created by other users as well and I don't want that to happen. To be more clear consider user A who creates 2 files 1.py and 2.py. Initially other users should not know what files user A has created and is working but if A wants to share 2.py with other users he can copy it to shared folder.

There is a similar method which is explained here suggesting to create a symbolic link but that is not working. The link actually says to login as a new user but how do I make it available to existing users. I can only login but I don't see shared folder in UI. Can someone help me how to achieve this. BTW my config file is located at /opt/jupyterhub_config.py