Show HN: macOS data protection keychain for Electron apps

Keychain-store is a new secure storage library for Electron and Node.js apps on macOS that leverages the native Data Protection Keychain to protect sensitive data. It allows developers to store strings and binary values with optional biometric authentication (Touch ID) and iCloud sync capabilities, while restricting access to explicitly entitled apps through code-signing. The library provides a simple API with methods to get, set, create, and remove keychain items, with support for both immutable and mutable data accounts.