fault, the library tries to use the Bluemix <code>VCAP_SERVICES</code> environment
variable to get the credentials for a given service. You can avoid this by
using:
<code>use_vcap_services</code>.</p>
<pre class="prettyprint source lang-javascript"><code>var watson = require('watson-developer-cloud');

var concept_expansion = watson.concept_expansion({
  version: 'v1-beta',
  use_vcap_services: false
});</code></pre><p>This example fails because you did not provide a username and password and
the library wi