I am working on making a form where the logged in user can write a text message and it gets saved to backend. Now the problem is I can't get to think as to how can I leverage and use the RainLab.User plug-in to get the logged in user and pass into my database model, the details of text message associated with that user.

Someone please help me and guide me.

Thanks.

Hello, You can get loggedIn user like below and add it in your component, controller or model. Extract from RainLab.User documentation.

The Auth::check method is a quick way to check if the user is signed in.
// Returns true if signed in.
$loggedIn = Auth::check();

To return the user model that is signed in, use Auth::getUser instead.
// Returns the signed in user
$user = Auth::getUser();