Changes to Retrieve storyboard metadata in WebVTT format

deleted the query request parameter TOKEN

added the new optional query request parameter token

the response's body type changed from no type to object for status 404

added the optional property code to the response with the 404 status

added the optional property error to the response with the 404 status

added the optional property message to the response with the 404 status

api tag Storyboards added

api tag Image removed

added the new optional query request parameter asset_end_time

added the new optional query request parameter asset_start_time

added the new optional query request parameter program_end_time

added the new optional query request parameter program_start_time

endpoint added