Rakutenomatic Rakuten Affiliate Post Generator

To whom it may concern, I just bought your plugin called, “Rakutenomatic Rakuten Affiliate Post Generator Plugin,” for my WordPress site.   However, I am having trouble trying to configure the Token Request Authorization required for the plugin to work.  I want to make sure that I am using the correct process to authorize the right API. The video that is on your site seems to be outdated as Rakuten API pages look completely different than in the video (its 1 and 1/2 years old now).  The instructions don't fit what is on Rakuten's site. Do you have updated information?