How do customers create a password for the panel?
You cannot create a password for your customers.
If you enable the password login for the Customer Panel and include the %customer_panel_url% placeholder in the email notifications your customers receive, they will be able to create their password when they visit the page for the first time since Amelia automatically generates a token for password creation.
Please note that you cannot add the URL of the panel, but instead you need to use the %customer_panel_url% placeholder.
If they want to change the password afterward, they can do it by logging into the panel using the old password and then navigating to the "My Profile" section which is accessed by clicking on the email next to the profile image.
They can also send themselves a "Forgot Password" email, which is saved as a "Customer Panel Access" email notification template. By default, it contains the %customer_panel_url% placeholder which will, again, generate a unique token for logging into the profile, and then the password can be changed through the "My Profile" section.