code: private boolean createPhotoFolder(DropboxAPI<AndroidAuthSession> dropboxApi) {
          boolean folderCreated = false;
          if (dropboxApi != null) {
              try {
                  dropboxApi.createFolder(mContext.getString(R.string.wings_dropbox__photo_folder));
                  folderCreated = true;
              } catch (DropboxException e) {
                  // Consider the folder created if the folder already exists.
                  if (e instanceof DropboxServerException) {
                      folderCreated = DropboxServerException._403_FORBIDDEN == ((DropboxServerException) e).error;
                  }
              }
          }
          return folderCreated;
      }
docs: Creates a directory for photos if one does not already exist. If the folder already exists, this call will
  do nothing.
  
  @param dropboxApi the {@link DropboxAPI}.
  @return true if the directory is created or it already exists; false otherwise.