If you are the owner of a team, you can configure the accepted login methods for your team members. Go to the Team Settings Panel > Authentication and Toggle the Login methods you want to authorize.

Another method of authentication is through allowing only email addresses from a determined domain.

Example: if your business e-mail domain is @marketing.com, every person with a @marketing.com e-mail address (e.g., mike@marketing.com, lisa@marketing.com) will be able to join your team automatically.

Finally, only for Enterprises, you can now configure SAML2-based Single Sign On for your company. This allows you to let your staff log in using their existing work account. You can integrate Okta, OneLogin, ADFS, or any other IdP of your choice.