I am new to SharePoint world.
I have created an app on SharePoint online. I have been trying to use Postman to get access token using Sharepoint online API but I am getting this error
AADSTS70000: Provided grant is invalid or malformed. error_codes:70000
My Postman request looks below: POST https://accounts.accesscontrol.windows.net/**realm_Id**/tokens/OAuth/2
grant_type=authorization_code &client_id=xxxxxxxxxxxxxxxxxxxxxxxxxxxx (UTF8 encoded - **client_id@realm_id**) &client_secret=xxxxxxxxxxxxxxxx (UTF8 encoded) &code=xxxxxxxxxxxxxxxx (UTF8 encoded) &redirect_uri=https%3A%2F%2Fwww.domain.com%2F (UTF8 encoded) &resource=xxxxxxxxxxxxx%2Fdomain.sharepoint.com%xxxxxxxxxxxxxxx (UTF8 encoded - resource/domain@relamId)
When I send above request, I get error mentioned above.
I checked some other posts about this error & it was pointing towards making sure redirect_uri is same in configured app & API request above. I checked, it is same.
App has redirect_uri as: https://www.domain.co.nz/ (slash at the end).
Can you please help me understand what am I doing wrong here?