Server methods hidden from Express.js server

[nikkovacevic]

Hello, I am trying to build an app to experiment with the API but I have ran into some problems.

When I try to call methods like SpotifyWebApi.authorizationCodeGrant() or SpotifyWebApi.refreshAccessToken() I get unresolved functions error. Apparently this is a security feature explained here and here . My application is an express.js server using spotify-web-api-node library version 4.0.0. It says that you can access those methods if they are used from node and not browser, but isn't express server side? Any help appreciated.

"express": "^4.18.2",
"spotify-web-api-node": "^4.0.0"