'Adds a certificate to a hosted service.
service_name:
Name of the hosted service.
data:
The base-64 encoded form of the pfx/cer file.
certificate_format:
The service certificate format.
password:
The certificate password. Default to None when using cer format.'

def add_service_certificate(self, service_name, data, certificate_format, password=None):

    _validate_not_none('service_name', service_name)
    _validate_not_none('data', data)
    _validate_not_none('certificate_format', certificate_format)
    _validate_not_none('password', password)
    return self._perform_post((((('/' + self.subscription_id) + '/services/hostedservices/') + _str(service_name)) + '/certificates'), _XmlSerializer.certificate_file_to_xml(data, certificate_format, password), async=True)
