Configuration of token lifetimes

[TomTHKim]

Thanks all for this plugin. I appreciate the work put into it.

For my use case, it would be useful to be able to configure the lifetimes of the access/ID tokens. This currently uses the default values from oauth2-server-php (3600s) and I don't see a way to change these in OpenID Connect Server (please correct me if I am wrong). Could we add a way to configure this?

Perhaps the fastest way to allow configuration of the OAuth server would be to add a configuration filter here:

wp-openid-connect-server/src/OpenIDConnectServer.php

Lines 33 to 39 in 1532bef

	$config = array(
	'use_jwt_access_tokens' => true,
	'use_openid_connect' => true,
	'issuer' => home_url( '/' ),
	);
	$server = new Server( new AuthorizationCodeStorage(), $config );

Something like:

    $config = apply_filters( 'oidc_server_config', array() );

    // Enforce required values
    $config['use_openid_connect']    = true;
    $config['use_jwt_access_tokens'] = true;
    $config['issuer']                = home_url( '/' );

    $server = new Server( new AuthorizationCodeStorage(), $config );

This allows most of the configuration values to be set whilst ensuring the required values are maintained.

Thanks for taking the time to read this.