Can Bubble create a header that includes a hash?

I want to have an API Workflow that accesses aws cloudwatch metrics for my Bubble Plugin, so that I can store the keys on the bubble server instead of on the client’s browser. The problem is that AWS requires its authorization header to include a nested has of several fields within the packet and the secret key:

Is there a simple solution to this that I have missed? It seems like the only choice is to create a server that has a simpler authentication protocol than aws cloudwatch metrics, and retrieve the metrics from it.

Also looked to do a similar thing wish bubble api connector plugin made this easy