Changes to GET /companies/:companySlug/products/:productId

added the optional property costPrice to the response with the 200 status

the response property incomeAccount became required for the status 200

the stock response's property type changed from integer to number, and format from int64 to float for status 200

the endpoint scheme security fiken_api_oauth was removed from the API

added the optional property createdDate to the response with the 200 status

added the optional property lastModifiedDate to the response with the 200 status