How to use the @aws-sdk/util-format-url.formatUrl function in @aws-sdk/util-format-url

new GetObjectCommand({
      Key: fileName,
      Bucket: config.s3Bucket
    })
  );

  const signer = new S3RequestPresigner({
    ...s3Client.config
  });

  const url = await signer.presignRequest(
    request,
    new Date(Date.now() + 60 * 60 * 1000)
  );
  // @ts-ignore
  return formatUrl(url);
};

resolvedEndpoint,
        new QueryBuilder(base64Encoder, utf8Decoder, "ec2")
      );
      let request = requestSerializer.serialize(model, input);
      const presignedRequest = await presignRequestQuery(request, {
        //FIXME: need an endpoint provider for given region
        endpoint: {
          ...resolvedEndpoint,
          hostname: `ec2.${input.SourceRegion}.amazonaws.com`
        },
        credentials: await credentialsProvider(),
        sha256,
        signingName: "ec2",
        signingRegion: input.SourceRegion
      });
      input.PresignedUrl = formatUrl(presignedRequest);
    }
    const revisedArgs = { ...args, input: input as Input };
    return next(revisedArgs);
  };
}

let request = requestSerializer.serialize(model, input);
      //DestinationRegion is not present in model
      request.query = request.query || ({} as QueryParameterBag);
      request.query["DestinationRegion"] = region;
      const presignedRequest = await presignRequestQuery(request, {
        //FIXME: need an endpoint provider for given region
        endpoint: {
          ...resolvedEndpoint,
          hostname: `rds.${sourceRegion}.amazonaws.com`
        },
        credentials: await credentialsProvider(),
        sha256,
        signingName: "rds",
        signingRegion: sourceRegion
      });
      input.PreSignedUrl = formatUrl(presignedRequest);
    }
    return next({ ...args, input: input as Input });
  };
}