Changes to Per-gram gold price by karat purity

the response property message became optional for the status 400

the response property message became optional for the status 401

the response property message became optional for the status 429

the response property message became optional for the status 503

response property message list-of-types was widened by adding types null to media type application/json of response 400

response property message list-of-types was widened by adding types null to media type application/json of response 401

response property message list-of-types was widened by adding types null to media type application/json of response 429

response property message list-of-types was widened by adding types null to media type application/json of response 503

removed the optional property detail from the response with the 422 status

the endpoint scheme security ApiKeyAuth was added to the API

the endpoint scheme security BearerAuth was added to the API

added the non-success response with the status 500

removed the non-success response with the status 403

removed the non-success response with the status 404

added the required property details to the response with the 422 status

added the required property error to the response with the 422 status

added the required property message to the response with the 422 status