Client Portal - Password protections

My clients emails have gotten hacked and strangers or hackers have been able to go into their accounts and mess with stuff like payments.

There are concerned of no security when it comes to logging into the portal. Especially when they want to share galleries to their family members. As a photographer I’d like to know via email capturing who they are sending to all times. Some can reference and back track if such issues arrive .

In short, can we please add a password or PIN login with a 4 to 6 digit PIN required in order for them to get into their galleries and Login personal client portals? Please!!!!