How to add table headers via delegate with rectangle?

[4k]

I have a TableView

import QtQuick 2.12
import QtQuick.Controls 2.12
 
import credentials 1.0
 
TableView {
    id: credentialsTableView
    property alias credentialsTableView: credentialsTableView
    anchors.fill: parent
    columnSpacing: 2
    rowSpacing: 2
    clip: true
 
    model: SqlCredentialsModel{}
    delegate: Rectangle {
        color: "lightblue"
        implicitWidth: lbl_tableCell.width
        implicitHeight: lbl_tableCell.height
        Label {
            id: lbl_tableCell
            text: display
        }
    }
}

import QtQuick 2.12
import QtQuick.Controls 2.12

import credentials 1.0

TableView {
    id: credentialsTableView
    property alias credentialsTableView: credentialsTableView
    anchors.fill: parent
    columnSpacing: 2
    rowSpacing: 2
    clip: true

    model: SqlCredentialsModel{}
    delegate: Rectangle {
        color: "lightblue"
        implicitWidth: lbl_tableCell.width
        implicitHeight: lbl_tableCell.height
        Label {
            id: lbl_tableCell
            text: display
        }
    }
}

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How can I add column headers?

Code is available in https://github.com/hstig/qt/tree/add...iteCredentials

Thanks