Specs

expires_in() :: integer()

The expire time (in seconds) to access_token and ticket temporary storage, by default it is 7200 seconds.

For hub scenario, both common and component application can override this function in the defined basic module if needed, and then can use this function as a global setting to use in access_token and ticket life cycle management, for example:

defmodule MyHubComponentClient do
  use WeChat.Component,
    scenario: :hub,
    adapter_storage: MyComponentLocalStorage

  def expires_in(), do: 7000
end

defmodule MyHubCommonClient do
  use WeChat,
    scenario: :hub,
    adapter_storage: MyCommonLocalStorage

  def expires_in(), do: 7000
end

For client scenario, no need to use this function, the local registry for access_token and ticket will use hub's response(contain time related) when fetch/refresh access_token and ticket to manage them as a client side temporary cache.