Fix renaming

Signed-off-by: Lixfel <agga-games@gmx.de>

src/de/steamwar/bungeecore/sql/SteamwarUser.java

@@ -137,6 +137,11 @@ public class SteamwarUser {
             return null;
         }
 
+        user = SteamwarUser.get(uuid);
+        if (user != null) {
+            return user;
+        }
+
         return SteamwarUser.createUserInDatabase(uuid, name);
     }