Hi @Kelvin1997,
Thank you for your post and welcome to our Community.
An authenticator app for two-factor authentication (2FA) enables the generation of security codes on your mobile device.
If you are not yet utilizing an authenticator app, I recommend reviewing the following Knowledge Base article that lists recommended apps: Security codes and apps for two-factor authentication
Hope you find this helpful. If there is any misunderstanding, kindly correct me.
Have a beautiful day,
Akiho
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