Changes to Retrieve Credits Pack

the response optional property currency_code became read-only for the status 200

the response optional property name became read-only for the status 200

the response optional property pack_amount became read-only for the status 200

the response optional property price became read-only for the status 200

the response property currency_code became required for the status 200

the response property name became required for the status 200

the response property pack_amount became required for the status 200

the response property price became required for the status 200

the response required property discount became read-only for the status 200

the response required property savings became read-only for the status 200