holli@DESKTOP-46NMP4B:~$ curl -v -X POST -i -u "apikey:xxx" --header "Content-Type: audio/flac" --data-binary x.flac "https://stream-fra.watsonplatform.net/speech-to-text/api/v1/recognize"
Note: Unnecessary use of -X or --request, POST is already inferred.
*   Trying 158.177.93.238...
* TCP_NODELAY set
* Connected to stream-fra.watsonplatform.net (158.177.93.238) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/certs/ca-certificates.crt
  CApath: /etc/ssl/certs
* TLSv1.2 (OUT), TLS handshake, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Client hello (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-RSA-AES256-GCM-SHA384
* ALPN, server accepted to use http/1.1
* Server certificate:
*  subject: C=US; ST=New York; L=Armonk; O=INTERNATIONAL BUSINESS MACHINES CORPORATION; CN=*.watsonplatform.net
*  start date: Jan  9 00:00:00 2018 GMT
*  expire date: Mar  9 12:00:00 2020 GMT
*  subjectAltName: host "stream-fra.watsonplatform.net" matched cert's "*.watsonplatform.net"
*  issuer: C=US; O=DigiCert Inc; OU=www.digicert.com; CN=GeoTrust RSA CA 2018
*  SSL certificate verify ok.
* Server auth using Basic with user 'apikey'
> POST /speech-to-text/api/v1/recognize HTTP/1.1
> Host: stream-fra.watsonplatform.net
> Authorization: Basic YXBpa2V5Onh4eA==
> User-Agent: curl/7.58.0
> Accept: */*
> Content-Type: audio/flac
> Content-Length: 6
>
* upload completely sent off: 6 out of 6 bytes
< HTTP/1.1 401 Unauthorized
HTTP/1.1 401 Unauthorized
< Date: Tue, 13 Nov 2018 18:52:41 GMT
Date: Tue, 13 Nov 2018 18:52:41 GMT
< Content-Type: application/json
Content-Type: application/json
< Content-Length: 37
Content-Length: 37
< Connection: keep-alive
Connection: keep-alive
* Authentication problem. Ignoring this.
< Www-Authenticate: Basic realm="IBM Watson Gateway(Log-in)"
Www-Authenticate: Basic realm="IBM Watson Gateway(Log-in)"

<
* Connection #0 to host stream-fra.watsonplatform.net left intact
{"code":401, "error": "Unauthorized"}