Passing username and password to server action

Created a server action. Its a query. I created a security provider with a single username and password. The url for the server connect is lets say for example, dmxconnect/api/test.php

I am trying to use logicapps workflow and trying to pass the username and password. I tried many variations and comes up with unauthorized.

In the get header I have authorization with the username:password. I also attempted few other variations.

So questions. 1) one is the proper formatting for the header to allow a connection to the server action and 2) Possible to just user a key instead of a username ans password?

Thanks for the help.

Hi Wesley,
Can you please explain a little more detailed what are you trying to achieve and what are your server action steps exactly?

Are you using password encryption?
If so, have you correctly managed the encryption in the login action?

I fail to see how login details help with using a Logic Apps workflow. The creation of an App is done using Azure and API’s are used to embed the Apps into your document. Postman can be your friend in this regard.