If you have an authorisation header like that, may I suggest you use the HTTP Make an API Key Auth Request module?
This allows you to store the credentials securely, and also allows you to reuse the same key in another HTTP module without having to set it up/type it in again.
Also another benefit is that keys don’t get exported in scenario blueprints, while plaintext fields in module fields do.
Here’s an example Missive 401 Error - #2 by samliew