Buffer's social sign in
In addition to email, you can create a new Buffer account using your Twitter, personal Facebook profile, or LinkedIn login credentials. Choosing one of these options will automatically connect that social account to your Buffer dashboard.
If you’d like to manage your social sign-in settings for your account, you can always do that by heading over to the My Account link at the top right of your Buffer dashboard and selecting Access & Password from the dropdown menu. From there, locate the Social Sign In section and toggle on or off your connected social accounts.
If you happen to share a social account with another person or a team of associates, you may want to consider turning off social sign-in for that one. This will help make sure your Buffer account is only accessible to you. If you decide to keep social sign-in enabled for shared accounts, it’s important to know that your entire Buffer account may be accessible to others.