HitPay.API.salt
You're seeing just the function
salt, go back to HitPay.API module for more information.
Link to this function
salt()
In config.exs, use a string, a function or a tuple:
config :hit_pay, salt: System.get_env("HIT_PAY_SALT")or:
config :hit_pay, salt: {:system, "HIT_PAY_SALT"}or:
config :hit_pay, salt: {MyApp.Config, :HIT_PAY_SALT, []}