Insert user.id to database (code)

@giri-zano OK I DID IT YAY.

I gave up on using code to enter the data and used @giri-zano 's advice

In Wix db, every row inside a collection CAN have an owner column filled. If a Member submits data to a collection, his userId is saved in the row, in the column _owner. Go to Content Manager (you know, the database spreadsheet thing), click on Manage Fields, tick "_owner", and voila.

Then I used this code to compare the active user.id to the poster user.id

export function dataset2_ready() {
 let user = wixUsers.currentUser;
 let userId = user.id;
 let isLoggedIn = user.loggedIn;

    $w("#input3").value = $w("#text35").text;

    $w.onReady(function () {
        $w("#dynamicDataset").onReady(() => {
 let itemFieldName = $w("#dynamicDataset").getCurrentItem()._owner;
 if (user.id === itemFieldName) {
                        console.log("hello post creator");
                    } else {
                        console.log("you're not the post creator" + itemFieldName + " " + user.id);
                    }
                });
    });
}

THANK YOU EVERYONE FOR THE HELP