public static boolean isPlayerInClan(final String playername) {
        try {
            final PreparedStatement ps = DatenbankCreatorMethod.getConnection().prepareStatement("SELECT NAME FROM ClanManager WHERE NAME = ?");
            ps.setString(1, playername.toString());
            final ResultSet rs = ps.executeQuery();
            return rs.next();
        }
        catch (SQLException e) {
            e.printStackTrace();
            return false;
        }
    }