code: def import_signed(cls, name, certificate, private_key):
          
          ca = ClientProtectionCA.create(name=name)
          try:
              ca.import_certificate(certificate)
              ca.import_private_key(private_key)
          except CertificateImportError:
              ca.delete()
              raise
          return ca
docs: Import a signed certificate and private key as a client protection CA.
          
          This is a shortcut method to the 3 step process:
          
              * Create CA with name
              * Import certificate
              * Import private key
          
          Create the CA::
          
              ClientProtectionCA.import_signed(
                  name='myclientca',
                  certificate_file='/pathto/server.crt'
                  private_key_file='/pathto/server.key')
              
          :param str name: name of client protection CA 
          :param str certificate_file: fully qualified path or string of certificate
          :param str private_key_file: fully qualified path or string of private key
          :raises CertificateImportError: failure during import
          :raises IOError: failure to find certificate files specified
          :rtype: ClientProtectionCA