In general, only one email address can be linked to one business account. This means you will either have to share your login details with your team or find a secure way using an app such as Lastpass to share your login information.
If you have a business account and run ads, you can add employees, team mates and external partners to help set up and manage campaigns for you. However, they do not have the same level of access as an admin would do. Click here to read more about how to add your team to your Ads Manager.