I am trying to do this using Postman. I have followed steps mentioned in : Magento 2: Where does the oAuth verifier token come from
I am able to get the oauth_verifier. But when I try to get the access token I face some issues. I tried POST /oauth/token/access by 2 ways:
1. Using online curl tool: I got "oauth_problem=OAuth+version+%5C%221.0%5C+is+not+supported" error.
2. Using Postman: I got "oauth_problem=Token+verifier+and+verifier+token+do+not+match" error.
I searched for these errors but could not get much information.
Any help on this would be appreciated.