[25.02.16 / TASK-117] Modify: email 값이 빈 값, null 값도 가능하게 처리#18

Nuung merged 1 commit intomainCheck-Data-Out/velog-dashboard-v2-api:mainfrom

feature/email-nullCheck-Data-Out/velog-dashboard-v2-api:feature/email-nullCopy head branch name to clipboard