User login/logout

Do you have any plugin installed that modifies the login behavior?

Yes, and I can’t disable the plugin. Is there some code I could add?

I found this:
simple_history_add("action=edited&object_type=plugin&object_name=your_plugin_name");
The login is handled by coursepress. Where would I place the simple_history code?

That snippet is a bit older. A more modern one is one similar to this:

SimpleLogger()->notice(
	"User {username} logged in",
	array(
		"username" => "the-username-that-logged-in"
	)
);

I’m not sure where you should add it, but you should look in CoursePress for att hook that fires when a user logs in.