I am facing 401 while calling download attachment API using oauth 2.0 3LO access token.

[Anuja Deshpande]

1st api : 
https://api.atlassian.com/ex/confluence/{cloudId}/rest/api/content/{pageId}/child/attachment

received download endpoint in response

Tried calling it using access token and oauth2.0 sysntax and received 401

https://api.atlassian.com/ex/confluence/{cloudid}/download/attachments/{pageid}/Screen%20Shot%202019-10-11%20at%203.19.28%20PM.png?version=1&modificationDate=1570787674135&cacheVersion=1&api=v2

[Nic Brough -Adaptavist-]

401 means you are not authorised, so you've either given it the wrong credentials or you're not calling the authorisation system correctly.

[Anuja Deshpande]

I am able to get response for other APIs with these steps and access token
problem is only while downloading attachments using oauth 2.0