How can I get Authentication Key for Rakuten?
<p>I am developing a web application for Rakuten.com .
I found their documentation in <a href="https://developers.rakuten.com/" rel="nofollow">https://developers.rakuten.com/</a> but for using Rakuten RMS API I need an authentication key. </p>

<p>Is there an another way for using this API without authentication key (like a demo api)?</p>

<p>Thanks.</p>