code: public function createFolder(Folder $folder, $parentId = 0, $inheritAccess = null)
      {
          $parameters = [
              'query' => ['parentId' => $parentId],
              'body' => json_encode(['folder' => $folder, 'inheritAccess' => $inheritAccess], JSON_UNESCAPED_UNICODE),
              'headers' => [],
          ];
  
          $result = $this->post('v1/folders', $parameters);
          $result = new FolderResponse($result);
  
          return $result;
      }
docs: Create a Folder.
  
  @param  Folder         $folder        A JSON encoded Folder to create
  @param  int            $parentId      An optional parent folder ID. Will otherwise be created in the root level. Note that root level creation requires additional access!.
  @param  bool           $inheritAccess Decides whether this Folder will inherit access from its parent folder
  @return FolderResponse