Log in with your Spotify account and click "Create App". Give it any name, and when asked which APIs you plan to use, select Web API.
Select "Web API" when asked which APIs you plan to use
This enables the endpoints needed to read your saved podcasts.
Paste your Client ID here
Found in your app's dashboard under "Settings".
Open your app settings and add this redirect URI
In your Spotify app → Settings → Redirect URIs → paste and click "Add".