1. For regular membership 

- My Page > Find ID/password 

- You can find it with your email or mobile phone number when you sign up.

2. In the case of simple SNS subscription (Facebook/Naver/Kakao) subscription: ID will be created arbitrarily if you have simple SNS subscription.

ex) Facebook : fa@**** / Naver : nh@*****/ Kakao: ka@***** - When you log in, click Simple login on SNS and enter your ID and password for each channel.