Login bar url to use in html code

i need to create login bar included to vertical menu i have maded by html code
so how can i know the url of the page that open when i press on the login bar

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You’d generally use Wix Members to do login so in that situation you’d use promptLogin - Velo API Reference - Wix.com to prompt the user to login. There’s no specific login page. Instead a prompt pops up for the user to login.