How do I change a extra email address to having its own account?

Hi, I needed an email address for work, my husband set it up and added it to my account as an extra address. I didn't want this. I wanted the e-mail to have its own account. How can I change this, as clients now have this address.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).