It's not clear to me what type of token we're talking about, but I believe it's related to the Authorization Code Grant, right? If yes, please check this page below. There is a step-by-step guide, including a video with demonstrations.
You can login or register as either a Docusign customer or developer. If you don’t already have a Docusign customer or developer account, you can create one for free when registering.
You can login or register as either a Docusign customer or developer. If you don’t already have a Docusign customer or developer account, you can create one for free when registering.