plugin = new MysqlNativePasswordPlugin();
plugin.init(this.connection, this.connection.getProperties());
if (addAuthenticationPlugin(plugin)) defaultIsFound = true;
plugin = new MysqlClearPasswordPlugin();
plugin.init(this.connection, this.connection.getProperties());
if (addAuthenticationPlugin(plugin)) defaultIsFound = true;
plugin = new Sha256PasswordPlugin();
plugin.init(this.connection, this.connection.getProperties());