src/main/kotlin/kr/co/vividnext/sodalive/member/auth/AuthRepository.kt

@@ -13,6 +13,8 @@ interface AuthRepository : JpaRepository<Auth, Long>, AuthQueryRepository
 interface AuthQueryRepository {
     fun getOldestCreatedAtByDi(di: String): LocalDateTime
     fun getMemberIdsByDi(di: String): List<Long>
+
+    fun getAuthIdByMemberId(memberId: Long): Long?
 }
 
 class AuthQueryRepositoryImpl(private val queryFactory: JPAQueryFactory) : AuthQueryRepository {
@@ -33,4 +35,13 @@ class AuthQueryRepositoryImpl(private val queryFactory: JPAQueryFactory) : AuthQ
             .where(auth.di.eq(di))
             .fetch()
     }
+
+    override fun getAuthIdByMemberId(memberId: Long): Long? {
+        return queryFactory
+            .select(auth.id)
+            .from(auth)
+            .innerJoin(auth.member, member)
+            .where(auth.member.id.eq(memberId))
+            .fetchFirst()
+    }
 }

src/main/kotlin/kr/co/vividnext/sodalive/member/auth/AuthService.kt

@@ -23,6 +23,10 @@ class AuthService(
     @Transactional
     fun verify(member: Member, request: AuthVerifyRequest) {
         val bootpay = Bootpay(bootpayApplicationId, bootpayPrivateKey)
+
+        val authId = repository.getAuthIdByMemberId(memberId = member.id!!)
+        if (authId != null) throw SodaException("이미 인증된 계정입니다.")
+
         try {
             val token = bootpay.accessToken
             if (token["error_code"] != null) throw SodaException("인증정보에 오류가 있습니다.\n다시 시도해 주세요.")
@@ -56,7 +60,7 @@ class AuthService(
                 throw SodaException("인증정보에 오류가 있습니다.\n다시 시도해 주세요.")
             }
         } catch (e: Exception) {
-            throw SodaException("인증정보에 오류가 있습니다.\n다시 시도해 주세요.")
+            throw SodaException(e.message ?: "인증정보에 오류가 있습니다.\n다시 시도해 주세요.")
         }
     }
 }