Create a report for all verifications.  Uses GET to /reports/verifications interface

        :Args:
            * *start_date*: (datetime) Start time for report generation
            * *end_date*: (datetime) End time for report generation

        :Returns: (str) CSV formatted report string

def report_verifications(self, start_date, end_date):
        """
        Create a report for all verifications.  Uses GET to /reports/verifications interface

        :Args:
            * *start_date*: (datetime) Start time for report generation
            * *end_date*: (datetime) End time for report generation

        :Returns: (str) CSV formatted report string

        """
        start_str, end_str = self._format_input_dates(start_date, end_date)
        params = {
            "start_date": start_str,
            "end_date": end_str
        }
        response = self._get(url.reports_verifications, params=params)
        self._check_response(response, 200)
        return self._create_response(response)