Automatic welcome message in the conversation when the project is created

I want to be able to configure an automatic welcome message that is sent in the conversation tab as soon as a client account or project is created. This message should be customizable so I can explain the 90-day link expiration policy and provide the permanent portal link (e.g., https://revelhome.app/connexion?slug=maison-boucault) right from the start. This would help educate clients and reduce support requests when their initial links expire.