I wish they let you add existing Pi users to your security group without having to have them as a contact in your phone. I am the only one that is really in crypto in my circle so I have no one in my contacts that would join, and I don't want to have to give my phone number to a random person to get added to or add them to my security group. They really need to allow for adding existing Pi users by username since most people are happy to be added for the "mining" boost. I understand that they are diligently working to advance the project, but making it hard to add existing users is poor foresight.