Fix accidentally reveresed statement

src/main.rs

@@ -49,7 +49,7 @@ fn main() {
         app.connect_activate(build_ui);
     });
 
-    if get_current_username().unwrap() != "pikaos" {
+    if get_current_username().unwrap() == "pikaos" {
         application.run();
     } else {
         println!("Error: This program can only be run via pikaos user");