So I figured out that it doesn’t work with some php versions.
Also for implementing custom things like register and so on you need to look in the g_userinfo.php file. there are some funtions inside.
You can manage everything with $_POST"yourpostvalue"] ( g_userinfo.php?yourpostvalue=Something );
Hope you understand something what I wrote…
Ill work on a new example with health and so on. ( A bit more advanced ) 
Cheers!