Function / Filter to check if user logged out by this plugin on a page

Hi,

I am using simple memberships pro plugin and have noticed when a user is logged out automatically, the custom message isn’t shown and instead the default message from the simple memberships pro plugin is shown which tells the user they need to login.

Are there any functions / filters I can use to check if the user has been logged out by this plugin so I can add a custom message to the default simple memberships pro plugin message?

Thanks