@kgkorespondencja … You can use it Asset Sheet of Config File. I hope you can see in the below Attached Spreadsheet.
Kindly note that Re-framework will handle only Asset as by Default not “Credential” type.
So, You can drag and Drop “Get Credential” Activity and Create a Argument for username & Password in “Out” direction
Ensure that you have create a Asset in the Name of “My_Credentials” and as a best practices keep the name and Value are same in the Config File.
Happy Learning !!