Setting up multi-factor authentication (MFA) takes about five minutes. You'll need your phone and a few minutes at a computer.
Before you start
You'll need an authenticator app on your phone. If you don't have one, open your phone's app store and download one — Google Authenticator, Microsoft Authenticator and Apple Passwords are all free and all work with Preno. Any of them is fine.
Steps
In Preno, click your username at the top right to open your Profile settings.
Find the Account security section, then Multi-factor authentication.
Click Add authenticator.
Re-enter your password to confirm your identity.
A QR code will appears on screen.
Open the authenticator app on your phone and look for the + icon to add a new account. Point your phone's camera at the QR code.
Your app will show a six-digit code for Preno. Type that code into Preno and click Enable.
Save your backup codes. Preno will now show you 10 backup codes. These are your way back into your account if you lose your phone. Store them somewhere safe. You can view and regenerate backup codes in this area as well.
That's it. Your login is now secured with MFA.
Signing in from now on
Enter your username and password as usual. Preno will then ask for the six-digit code from your authenticator app. The code changes every 30 seconds, so use whichever one is showing.
Troubleshooting
"Your code has expired" or the code isn't accepted
This is almost always your phone's clock. Authenticator codes depend on the exact time, so if your phone's clock has drifted the codes won't match. Go into your phone's date and time settings and switch them to set automatically, then try again.
The QR code won't scan
Most authenticator apps let you type in a setup key manually instead. Look for a "enter code manually" or similar option in the app.
You've replaced your phone
If you still have access to your Preno account, remove the old authenticator from your profile and set up the new one using the steps above. If you can't sign in, see this article Can't sign in? Lost phone or authenticator.