required = false 인 파라미터 전부 옵셔널 파라미터로 변경

src/main/kotlin/kr/co/vividnext/sodalive/content/AudioContentController.kt

@@ -104,7 +104,7 @@ class AudioContentController(private val service: AudioContentService) {
     @GetMapping
     fun getAudioContentList(
         @RequestParam("creator-id") creatorId: Long,
-        @RequestParam("sort-type", required = false) sortType: SortType = SortType.NEWEST,
+        @RequestParam("sort-type", required = false) sortType: SortType? = SortType.NEWEST,
         @RequestParam("category-id", required = false) categoryId: Long? = 0,
         @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?,
         pageable: Pageable
@@ -114,7 +114,7 @@ class AudioContentController(private val service: AudioContentService) {
         ApiResponse.ok(
             service.getAudioContentList(
                 creatorId = creatorId,
-                sortType = sortType,
+                sortType = sortType ?: SortType.NEWEST,
                 categoryId = categoryId ?: 0,
                 member = member,
                 offset = pageable.offset,