Changes to Get Api Usage

added the non-success response with the status 402

added the optional property retryable to the response with the 401 status

added the optional property retryable to the response with the 403 status

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

added the optional property retryable to the response with the 409 status

added the optional property retryable to the response with the 422 status

added the optional property retryable to the response with the 429 status

added the optional property retryable to the response with the 500 status

added the required property by_client to the response with the 200 status