Click [Find ID / Password].

Enter your phone number and click [Use SMS].
※ Use the phone number in your registration.

Check your SMS and enter the code.
※ The verification code that comes with international SMS is 6 digits.

Enter your new password and click [Save new password]

PIN CODE screen will appear for 2FA authentication. Enter the last four-digit number of your phone if registered.
※ Do not forget to change your PIN CODE after your login. Login > Setting > PIN CODE > Click pen-icon