how do I include an external header file to unreal?

Development Programming & Scripting C++
1

Hello :), I’m creating a launcher for my game… and now… when the user singup in the launcher… it temporally saves the

<Email>HELLO@hotmail.com</Email>

and

<Password>pass123<Password>

in an Xml file… I can acces to that file using standar C++ codes… but how can I add that code into unreal :(?? please help…