fix(samples): end stream before destroying it (#611)
fix(samples): end stream before destroying it (#611)

I've been getting this error until I put call of end() for the stream before destroying it.
`API request error 14 UNAVAILABLE: 408:Request Timeout`

Co-authored-by: Alexander Fenster <6478fa08e27a96b3fd9dd70550141c2ad89ec221@google.com>
googleapis/nodejs-speech,googleapis/nodejs-speech,googleapis/nodejs-speech