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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _credentials_found_in_envars():
 """Check for credentials in envars. Returns: bool: ``True`` if at least one is found, otherwise ``False``. """

        return any([os.getenv('PAN_ACCESS_TOKEN'),
                    os.getenv('PAN_CLIENT_ID'),
                    os.getenv('PAN_CLIENT_SECRET'),
                    os.getenv('PAN_REFRESH_TOKEN')])