Changes to Download a certificate

the response property data became required for the status 200

the response property data/chain became required for the status 200

the response property data/root became required for the status 200

the response property data/server became required for the status 200

the response property message became required for the status 404

the response property data/root became nullable for the status 200

the response property data became optional for the status 200

the response property data/chain became optional for the status 200

the response property data/root became optional for the status 200

the response property data/server became optional for the status 200

the response property message became optional for the status 404