Get access token with JWT Grant

 1.       Request application consent (no need to copy code from redirect link localhost, code is only needed for Auth Code Grant) 
https://account-d.docusign.com/oauth/auth?Rresponse_type=code&scope=signature&client_id= 6e18b0f9-………b0ac2fc5a4d3&redirect_uri=http://localhost/
2.      Create a JWT 
To authenticate in the JWT Grant flow, you will need to create a JWT containing data on the authentication request, then exchange it for an access token  From https://jwt.io/ encode Header and Payload data 
Get “iat” from current epoch time from https://www.epochconverter.com/ , make sure this is run after step 1  Set “exp” to “iat”+6000        3) Get AccessToken from postman  POST https://account-d.docusign.com/oauth/token  Body:   assertion= {the encoded content from jwt.io}  grant_type  =urn:ietf:params:oauth:grant-type:jwt-bearer    4)Same as Auth Code Grant, call API with AccessToken