How to establish an OAuth connection using JWT User Assertion in OIC Gen 2?

Summary:

How to establish an OAuth connection using JWT User Assertion in OIC Gen 2

Content (required):

I need to connect to a rest using JWT User Assertion in OIC Gen 2. In order to generate the access token, I must create a JWT token called client_assertion, which will be passed in the request data. It should contain specific header and body data and be signed with the private key.

The JWT client_assertion has a specific format and rules that must be followed for it to be considered valid, allowing the issuance of the access token

 Header format:

{

"alg": "RS256",