def get_all_signing_certs(self, marker=None, max_items=None,
                              user_name=None):
        params = {}
        if marker:
            params['Marker'] = marker
        if max_items:
            params['MaxItems'] = max_items
        if user_name:
            params['UserName'] = user_name
        return self.get_response('ListSigningCertificates',
                                 params, list_marker='Certificates')
Get all signing certificates associated with an account.
dataset/ETHPy150Open darcyliu/storyboard/boto/iam/connection.py/IAMConnection.get_all_signing_certs