Resolve "As a QR-scanning connoisseur , I want to unlock stickers after scanning a QR code to feel a sense of reward."

Closes #73 (closed)

src/main/java/Team5/SmartTowns/data/DatabaseController.java

@@ -9,8 +9,10 @@ import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.SQLException;
 import java.util.*;
+
 @Controller
 public class DatabaseController {
+
     @Autowired
     private LocationRepository locationRepository;
     @Autowired