Changes to Get past staking reward payouts for an account

the response property _status/messages/items/data became nullable for the status 400

the response property _status/messages/items/data became nullable for the status 404

the response property _status/messages/items/detail became nullable for the status 400

the response property _status/messages/items/detail became nullable for the status 404

the response property links/next became nullable for the status 200

the response property rewards/items/account_id became nullable for the status 200