Save tracks token using keychain

[mbedded]

The Obsidian release notes state the following

New "Keychain" settings section for storing plugin secrets. Plugin API is coming soon
– Source: https://obsidian.md/changelog/2026-01-12-desktop-v1.11.4/

The "token" should be stored using this keychain.

[mbedded]

It seems the API has been extended so we can use the Obsidian-Secret-Storage
https://docs.obsidian.md/plugins/guides/secret-storage