How to authenticate WooCommerce REST API
<p>I have generated the consumer key and consumer secret but I don't know how to aply it to authenticate on Postman. This is the screenshot below:</p>

<p><img src="https://cloud.githubusercontent.com/assets/18336192/17737918/230a1580-6487-11e6-8efb-86a6ad8ed3f5.png" alt="screenshot from 2016-08-17 14-28-18"></p>

<p>The url looks like this: <code>https://mystore.com/wp-json/wc/v1/coupons?oauth_consumer_key=ck_XXXXXXXXXXXXXXX&amp;oauth_signature_method=HMAC-SHA1&amp;oauth_timestamp=1471440398&amp;oauth_nonce=Qaq8cK&amp;oauth_version=1.0&amp;oauth_signature=XXXXXXXXXXXXXXXXXXXXXXXXXw=</code></p>

<p>But this is returning error 401:</p>

<p><code>
{
  "code": "woocommerce_rest_cannot_view",
  "message": "Sorry, you cannot list resources.",
  "data": {
    "status": 401
  }
}
</code>
I have read the <a href="http://woothemes.github.io/woocommerce-rest-api-docs/?php#authentication" rel="nofollow">the documentation</a> but it didn't show any examples. </p>