Invoking External Rest API in OIC which uses token based authorization

Hello, 

I am developing some integrations in the Oracle Integration Cloud. I have an external service that provided us credentials to use and fetch an access token and use that token in subsequent requests. The token is valid for 2 hours. Now that I have to make multiple calls to the external service main integration API , I am saving the token recieved previously in lookup and using it in the pipeline to call the external service.
There is another integration scheduled that fetches the new token and updates the token in the OIC lookup table, so my main integration service has the "always valid" token available to invoke the client API.