code: def get_credentials(self):
          
          creds_mgr = CredentialsManager(self)
          creds = creds_mgr.get_credentials_from_upload_api()
          return {
              'aws_access_key_id': creds['access_key'],
              'aws_secret_access_key': creds['secret_key'],
              'aws_session_token': creds['token'],
              'expiry_time': creds['expiry_time']
          }
docs: Return a set of credentials that may be used to access the Upload Area folder in the S3 bucket
          :return: a dict containing AWS credentials in a format suitable for passing to Boto3
              or if capitalized, used as environment variables