@MKS_AWS You can do this in different ways.
Possibility 1
Create variables in VariableRegistry containing your authorization data.
Possibility 2
Create a parameter list and define your authorization data there in parameters.
In both ways you can use the variables or parameters inside the InvokeHTTP.
Here an example with variables.
If you get your authorization data from a database table just set them into attributes and use them in the same way.