"You do not have permissions to access this resource..." when trying to create a web map using REST api

[MalindaWeersainghe]

Hi,

Trying to create a test web map using rest api using postman

but always get ,

{"error":{"code":403,"messageCode":"GWM_0003","message":"You do not have permissions to access this resource or perform this operation.","details":[]}}

How to solve this ? 

Thank you

[Anonymous User · Accepted solution]

You need to generate an access token:

Generate Token—ArcGIS REST API: Users, groups, and content | ArcGIS for Developers