To add a button that triggers the login/register modal you can follow these steps.

1. Edit the page in Elementor – and add a new button or link
2. Edit the button in Elementor
3. Add “wprentals_elementor_login” or “wprentals_elementor_register” in the Button ID field
4. Customize the button , save and test

Alternatively, you can add the IDs “wpresidence_elementor_register” and “wpresidence_elementor_login” in the CSS ID field ( Advanced Tab ) for any other Elementor item.