code: def upload_file(self, filepath, overwrite=True):
          
          method = 'POST'
          filename = os.path.split(filepath)[1]
          endpoint = '/rest/v1/storage/{}/{}?overwrite={}'.format(
              self.client.sauce_username, filename, "true" if overwrite else "false")
          with open(filepath, 'rb') as filehandle:
              body = filehandle.read()
          return self.client.request(method, endpoint, body,
                                     content_type='application/octet-stream')
docs: Uploads a file to the temporary sauce storage.