how to make linux openvpn server do its authentication from username and password stored in mysql database

Would like to set up a vpn server that would authenticate its users from credentials stored in a database and if possible update the database after authentication. Been researching on this concept but have not found anything reasonable. Thank you

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You’d have to write your own auth script and then include the directives in your config file:

script-security 3
auth-user-pass-verify <script> env

Then script would have to make use of the environment variables username and password and do a MYSQL lookup and return a 0/1 exit code based on the success of this lookup.