curl -X POST -vu clientid:secret http://localhost:8080/oauth/token -H "Accept: application/json" -d "client_id=clientid&grant_type=password&username=admin&password=admin"
*   Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 8080 (#0)
* Server auth using Basic with user 'clientid'
> POST /oauth/token HTTP/1.1
> Host: localhost:8080
> Authorization: Basic Y2xpZW50aWQ6c2VjcmV0
> User-Agent: curl/7.43.0
> Accept: application/json
> Content-Length: 68
> Content-Type: application/x-www-form-urlencoded
>
* upload completely sent off: 68 out of 68 bytes
< HTTP/1.1 401
< X-Content-Type-Options: nosniff
< X-XSS-Protection: 1; mode=block
< Cache-Control: no-cache, no-store, max-age=0, must-revalidate
< Pragma: no-cache
< Expires: 0
< X-Frame-Options: DENY
< Access-Control-Allow-Origin: *
< Access-Control-Allow-Methods: POST, GET, OPTIONS, DELETE, PUT
< Access-Control-Max-Age: 3600
< Access-Control-Allow-Headers: accept, authorization, x-requested-with, content-type
< WWW-Authenticate: Bearer error="unauthorized"
< Content-Type: application/json;charset=UTF-8
< Transfer-Encoding: chunked
< Date: Mon, 23 Oct 2017 05:58:33 GMT
<
{
  "error" : "unauthorized",
  "error_description" : null
* Connection #0 to host localhost left intact
}root@y2k-CIH:/home/y2k#