<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_datapoints(self, params):
 """ Will make a direct REST call with the given json body payload to get datapoints. """

        url = self.query_uri + '/v1/datapoints'
        return self.service._get(url, params=params)