Hopefully by now, most most forum users will have moved away from the Atlassian Crowd single sign on method. By doing so, anyone can now enable two factor authentication for their FreePBX community forum login. YOU MUST DO THIS TO HAVE ACCESS TO TWO-FACTOR AUTHENTICATION SETTINGS.
To enable 2FA, click your user icon in the upper right hand corner and then click the profile icon, then click Preferences:
From the following screen click the Security tab and then the Manage two factor authentication button:
From there you can get a QR code to setup the typical 2FA authenticator App, and once setup you can download two factor backup codes.