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A comment on Tell HN: SMS can be used to bypass Sendgrid’s 2FA. Parent comment

Re:Tell HN: SMS can be used to bypass Sendgrid’s 2FA by adamckay on Sunday November 06, 2022 @01:05PM (#33495358)
Backup codes can be generated at setup and displayed to the user (and never displayed again) which can log you in so you can reset your MFA device.

Google does this.

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