Amplify Toolbox
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    MFASettings:
        | {
            email: MFAEmailSettings;
            sms?: MFASmsSettings;
            totp?: MFATotpSettings;
        }
        | { email?: MFAEmailSettings; sms: MFASmsSettings; totp?: MFATotpSettings }
        | { email?: MFAEmailSettings; sms?: MFASmsSettings; totp: MFATotpSettings }

    Configure the MFA types that users can use. At least one of totp, sms, or email is required.