Add sqlite database

src/main.rs

@@ -1,7 +1,11 @@
+mod database;
 mod player;
 mod userinterface;
 
-fn main() {
+use tokio;
+
+#[tokio::main]
+async fn main() {
     let player = player::MprisPlayer::new().expect("Could not create player");
 
     let (usernumber, userrating) = userinterface::get_user_rating().expect("Lala");