diff --git a/src/server/utils/api-error.ts b/src/server/utils/api-error.ts
index a31f5f0bb..b02e45b00 100644
--- a/src/server/utils/api-error.ts
+++ b/src/server/utils/api-error.ts
@@ -8,37 +8,37 @@ export class ApiError extends Error {
     this.statusCode = options.statusCode;
   }
 
-  static badRequest(message: string) {
+  static badRequest(message?: string) {
     return new ApiError({
       message: message || 'Bad request.',
       statusCode: 400,
     });
   }
 
-  static unauthorized(message: string) {
+  static unauthorized(message?: string) {
     return new ApiError({
       message: message || 'Unauthorized.',
       statusCode: 401,
     });
   }
 
-  static forbidden(message: string) {
+  static forbidden(message?: string) {
     return new ApiError({ message: message || 'Forbidden.', statusCode: 403 });
   }
 
-  static notFound(message: string) {
+  static notFound(message?: string) {
     return new ApiError({ message: message || 'Not found.', statusCode: 404 });
   }
 
-  static conflict(message: string) {
+  static conflict(message?: string) {
     return new ApiError({ message: message || 'Conflict.', statusCode: 409 });
   }
 
-  static gone(message: string) {
+  static gone(message?: string) {
     return new ApiError({ message: message || 'Gone.', statusCode: 410 });
   }
 
-  static internal(message: string) {
+  static internal(message?: string) {
     return new ApiError({
       message: message || 'Internal error.',
       statusCode: 500,