The default Magento admin dashboard login url is:
Where <your_domain_name> is the domain name of your Magento 2 store, and <your_admin_path> is the path to your admin panel. If you have not changed the admin path during the Magento 2 installation, the default admin path is /admin.
For example, if your Magento 2 store is hosted at www.example.com and you have not changed the admin path during the installation, the URL for the admin dashboard login page would be:
If you have changed the admin path during the installation, you can find the correct URL by looking at your Magento 2 installation directory, specifically the app/etc/env.php file. Look for the backend section and check the value of the frontName parameter. This is the path to your admin panel.
For example, if the frontName parameter is set to myadmin, the URL for the admin dashboard login page would be: