Content Fragment Creation using Post Asset API return 403 Forbidden status
I am following the tutorial mentioned in adobe link https://docs.adobe.com/content/help/en/experience-manager-learn/sites/content-fragments/content-fragments-delivery-feature-video-use.html
and in that specific section "Using the Assets HTTP API" . There is sample CURD operation available Example POSTMAN Requests: CRUD-CFM-API-We.Retail.postman_collection.json . On running post operation I am getting 403 exception. The get operation works fine after providing basic authentication value. For Post operation even after providing basic authentication it return 403 status only.
Is there any security setting I am missing ?
The AEM version is 6.5.2 and trying this exercise in fresh vanilla instance.