可提供雙因素認證，但並未設定給此帳號。
僅以密碼登入。
以 HOTP 及 TOTP 應用程式，為 FreeOTP、Google Authenticator 或 AuthyProvides 提供認證。
Provides authentication using hardware security tokens supporting the WebAuthn/FIDO2 protocol, such as a YubiKey.
The FIDO U2F API has been deprecated in favor of the Web Authentication API (WebAuthn). Provides authentication using hardware security tokens supporting FIDO U2F, such as a YubiKey.
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