servant

Otherwise one might get an error like:

cachix push /nix/store/7i1kqf6x52l1fhqqdmqgggjr0zigggik-cachix-0.1.3/bin/cachix

NoInput "You need to specify store paths either as stdin or as a cli argument"

Operating system or device, package version, compiler version:
All

Issue description:
In the scotty example (examples/scotty) the key specified by KEY= on launch is not verified. If the incorrect key is specified on GitHub the example server doesn't care. This is a security risk and means that the scotty example should not be used in production.

**Note: This is not applicable t

We need to catch up with the current API: https://developers.line.biz/en/reference/messaging-api/

Roadmap of new features:

• Managing audience
• Insights
• [OAuth v2.1](https://developers.line.biz/en/reference/messaging-api/#chann