unsubscribeWorkbook

@PostMapping(value = ["/workbooks/{workbookId}/unsubs"])
fun unsubscribeWorkbook(@AuthenticationPrincipal userDetails: TokenUserDetails, @PathVariable(value = "workbookId") @Min(value = 1, message = "{min.id}") workbookId: Long, @Valid @RequestBody body: UnsubscribeWorkbookRequest?): ApiResponse<ApiResponse.Success>