How to use the @cumulus/cmrjs.getMetadata function in @cumulus/cmrjs

passphrase: process.env.launchpad_passphrase,
        certificate: process.env.launchpad_certificate
      };
      const token = await launchpad.getLaunchpadToken(config);
      params.token = token;
    } else {
      const secret = await commonAws.secretsManager().getSecretValue({
        SecretId: process.env.cmr_password_secret_name
      }).promise();

      params.username = process.env.cmr_username;
      params.password = secret.SecretString;
    }

    const cmr = new CMR(params);
    const metadata = await cmrjs.getMetadata(granule.cmrLink);

    // Use granule UR to delete from CMR
    await cmr.deleteGranule(metadata.title, granule.collectionId);
    await this.update({ granuleId: granule.granuleId }, { published: false }, ['cmrLink']);
  }

error: exception,
          createdAt: get(payload, 'cumulus_meta.workflow_start_time'),
          timestamp: Date.now(),
          productVolume: getGranuleProductVolume(g.files),
          timeToPreprocess: get(payload, 'meta.sync_granule_duration', 0) / 1000,
          timeToArchive: get(payload, 'meta.post_to_cmr_duration', 0) / 1000,
          processingStartDateTime: extractDate(payload, 'meta.sync_granule_end_time'),
          processingEndDateTime: extractDate(payload, 'meta.post_to_cmr_start_time')
        };

        doc.published = get(g, 'published', false);
        // Duration is also used as timeToXfer for the EMS report
        doc.duration = (doc.timestamp - doc.createdAt) / 1000;

        if (g.cmrLink) {
          const metadata = await cmrjs.getMetadata(g.cmrLink);
          doc.beginningDateTime = metadata.time_start;
          doc.endingDateTime = metadata.time_end;
          doc.lastUpdateDateTime = metadata.updated;

          const fullMetadata = await cmrjs.getFullMetadata(g.cmrLink);
          if (fullMetadata && fullMetadata.DataGranule) {
            doc.productionDateTime = fullMetadata.DataGranule.ProductionDateTime;
          }
        }

        return this.create(doc);
      }
      return Promise.resolve();
    });