Unable to retrieve token for LinkedIn API

I am trying to get a token to run the LinkedIn API, but after running the Request Token on Postman, the normal login screen is displayed ->login and I cannot proceed with the application authorization.

As a result, I cannot run the API because I cannot get the token. Could you please point out something wrong?

Callback URL https://www.getpostman.com/oauth2/callback
Auth URL https://www.linkedin.com/developers/apps/verification/2f0c44bf-6c0b-44a3-bbdb-ade065064e65
Access Token URL https://www.linkedin.com/oauth/v2/accessToken

Client ID and Secret are obtained from App.