def upload_signing_cert(self, cert_body, user_name=None):
        params = {'CertificateBody' : cert_body}
        if user_name:
            params['UserName'] = user_name
        return self.get_response('UploadSigningCertificate', params,
                                 verb='POST')
Detects whether we have everything needed to mount sshfs filesystems.
dataset/ETHPy150Open darcyliu/storyboard/boto/iam/connection.py/IAMConnection.upload_signing_cert--crossover with--dataset/ETHPy150Open spantaleev/sftpman/sftpman/cli.py/SftpCli.command_preflight_check