CreateConnectedService.
        [Preview API]
        :param :class:`<WebApiConnectedServiceDetails> <azure.devops.v5_0.core.models.WebApiConnectedServiceDetails>` connected_service_creation_data:
        :param str project_id:
        :rtype: :class:`<WebApiConnectedService> <azure.devops.v5_0.core.models.WebApiConnectedService>`

def create_connected_service(self, connected_service_creation_data, project_id):
        """CreateConnectedService.
        [Preview API]
        :param :class:`<WebApiConnectedServiceDetails> <azure.devops.v5_0.core.models.WebApiConnectedServiceDetails>` connected_service_creation_data:
        :param str project_id:
        :rtype: :class:`<WebApiConnectedService> <azure.devops.v5_0.core.models.WebApiConnectedService>`
        """
        route_values = {}
        if project_id is not None:
            route_values['projectId'] = self._serialize.url('project_id', project_id, 'str')
        content = self._serialize.body(connected_service_creation_data, 'WebApiConnectedServiceDetails')
        response = self._send(http_method='POST',
                              location_id='b4f70219-e18b-42c5-abe3-98b07d35525e',
                              version='5.0-preview.1',
                              route_values=route_values,
                              content=content)
        return self._deserialize('WebApiConnectedService', response)