{"errorCode":"ValidationError","errorMessage":"[[\"username\" \uc758 \"#ENTER_YOUR_OWN#\" \uac12\uc740 \uc720\ud6a8\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \/^[a-zA-Z0-9_-]{1,19}$\/ \uc815\uaddc\uc2dd \ud328\ud134\uacfc \uc77c\uce58\ud574\uc57c \ud569\ub2c8\ub2e4., \"username\" must be a valid email, \"username\" \uac1d\uccb4 \uc5ec\uc57c\ud569\ub2c8\ub2e4.]]"}400