[KW-553] fix: fcm 토큰 없을때 null error 나지 않도록 수정#22

coffeesigma merged 1 commit intodevelopTeamDoubleO/member-service:developfrom

KW-553/feat/member-grpc-fcm-token-nullableTeamDoubleO/member-service:KW-553/feat/member-grpc-fcm-token-nullableCopy head branch name to clipboard