Runtime configuration for webhook secrets.
Delivery and cloud credentials are never read from application env; they
live on an explicit %Anu.Client{} (see Anu.Client). This module only
resolves the webhook secrets used as fallbacks by Anu.Webhook.Plug when
the :secret / :verify_token plug options are not given.
Configuration keys
config :anu,
verify_token: "your_verify_token",
app_secret: "your_app_secret"
Summary
Functions
Returns the WhatsApp app secret for webhook signature verification.
Returns the webhook verification token.