code: def handle_unauthorized_file_type(error):
      '''Error occuring when the user try to upload a non-allowed file type'''
      url = url_for('api.allowed_extensions', _external=True)
      msg = (
          'This file type is not allowed.'
          'The allowed file type list is available at {url}'
      ).format(url=url)
      return {'message': msg}, 40f handle_unauthorized_file_type(error):
      '''Error occuring when the user try to upload a non-allowed file type'''
      url = url_for('api.allowed_extensions', _external=True)
      msg = (
          'This file type is not allowed.'
          'The allowed file type list is available at {url}'
      ).format(url=url)
      return {'message': msg}, 400
docs: Error occuring when the user try to upload a non-allowed file type