How to join the Surfshark referral program? How to enable 2FA on your Surfshark account? What to do if I have lost or forgotten my email address or password? I need to change the registration email. How can I do that? How many devices can I use with Surfshark simultaneously? What is 2FA and why is it important? How to enable 2FA for multiple users? Does Surfshark keep any details of user accounts? Do you keep any logs of my internet activities?