Selecting Save User ID saves your ID on the computer or mobile device you're currently using. Each time you log in, your User ID will automatically appear, which means that we recognize the device.
Note: You should not use the Save User ID feature on public devices, such as those in a kiosk, library or café.
In addition to your password, you can choose to enter an authorization code — either every time you log in or only when logging in from an unrecognized device. For details, please go to the Security Center after you log in.