Hey!
The README currently shows redirect URI examples using "localhost", but Spotify's API requires explicit loopback addresses (IPv4 or IPv6) for OAuth callbacks and will reject "localhost" as a redirect URI, causing authentication failures. All instances of "localhost" in redirect URI examples should be replaced with "127.0.0.1".
Hey!
The README currently shows redirect URI examples using "localhost", but Spotify's API requires explicit loopback addresses (IPv4 or IPv6) for OAuth callbacks and will reject "localhost" as a redirect URI, causing authentication failures. All instances of "localhost" in redirect URI examples should be replaced with "127.0.0.1".