Access the local app api via postman missing bearer

[LBeckX]

Hi,

I have created a Shopify App. I used the demo app in NodeJS as a template. I added this app to my demo shop.
Now I have added new API routes and would like to test them via Postman local. When starting the instance via "npm run dev", the localhost:PORT under which the instance is running is displayed in the console.
Now I would like to send a request via Postman. However, the bearer token for accessing the app is missing in Postman. How can I create a bearer or access my api via basic auth or something like this?