UBUNTU 16.04 - OPENVPN 4.3 Server MYSQL AUTH Plugin

Hello, i need a Plugin for Ubuntu 16.04 - OpenVPN 4.3 Server Plugin who can select a userdatabase from a remote mysql server when the user exist it should check the secured pw then when its ok it should auth the connection otherwise it should close the openvpn and mysql connection. When the connection user details are right it should update the mysql databse and change the user_online=0 to user_online=1. When the user close the connection it should change the user_online to 0 and close the mysql connection. the plugin should work so that i can change the mysql host/user/pw/db/table in a config file and the sql commands like: hostname 1.1.1.1.1 login user passw pass db db port 3306 debug_sql on default_pf_rules_clients accept default_pf_rules_subnets drop auth_user_pass_verify_query SELECT username FROM user WHERE username='{{escaped_username}}' AND password='{{escaped_password}}' auth_user_pass_verify_user_access_query SELECT username FROM user WHERE user_enable=1 AND user_online<4 AND username='{{escaped_username}}' client_connect_query UPDATE user SET user_online=1 WHERE username='{{escaped_username}}' client_disconnect_query UPDATE user SET user_online=0 WHERE username='{{escaped_username}}'