Approve the Invoice using BPM task API without providing the password in authorization.

Summary:

I am trying to approve Invoice using BPM task rest api, But for authorization we have to provide approver username and password, here in our project we use SSO for all our fusion application, so we don't have a password. so is there a way to approve the BPM task without providing the password.

Content (please ensure you mask any confidential information):

If it can work by passing JWT token, please provide the steps to get JWT token.

This is one of the blog I found which i followed, but it didn't worked for me, what is the exact way of getting JWT token.