based database and account progress

db/db.go

@@ -120,3 +120,9 @@ func LoadPlayerState(playerID int) (x, y int, err error) {
 	}
 	return x, y, err
 }
+
+func GetUsername(playerID int) (string, error) {
+	var username string
+	err := db.QueryRow("SELECT username FROM players WHERE id = ?", playerID).Scan(&username)
+	return username, err
+}