Redirect URI now must be secured

[anisghaoui]

Beginning on the 9th of April 2025, Spotify now expects secure URI

• Use HTTPS for your redirect URI, unless you are using a loopback address, when HTTP is permitted.
• If you are using a loopback address, use the explicit IPv4 or IPv6, like http://127.0.0.1:PORT or http://[::1]:PORT as your redirect URI.
• localhost is not allowed as redirect URI

source: https://developer.spotify.com/documentation/web-api/concepts/redirect_uri

[anisghaoui]

They add

"We expect all clients to migrate to the new redirect URI validation by November 2025."

That means all of the instances of this MMM will be shutdown.