Using your own Spotify API ensures your safety and privacy. I do not have access to your data, and Spotify requires your explicit approval. Here are the steps to set up your API:

1. Login at the Spotify Developer Dashboard.
2. Click on "Create App".
3. Set the "Redirect URIs" field to https://oldmartijntje.github.io/localNodeBox/dataTools/spotify to redirect back to this website.
4. Select the "Web API" checkbox.
5. Fill in the other required fields as you see fit.
6. Click the "Save" button.
7. Go to the "Settings" tab.
8. Copy your "Client ID" under the "Basic Information" section.

Now you can use your Spotify API on this website by entering your "Client ID" in the login page. You'll be redirected to Spotify's login page to authenticate.