Write an article based on this "Open Messenger. Tap the Profile button. Tap Switch Account. Tap +. Enter the information for the account you want to add. Tap OK. Tap Require to require a password. Tap Continue as [name]. Enter your phone number. Tap Ok to allow Messenger to continuously upload your contacts. Tap Invite next to any friends you want to invite to Messenger. Tap Done."

Article:
It’s a white app with a blue speech bubble. If you’re not logged in, you’ll be prompted to do so. It’s a blue circle with the outline of a person in the top left corner. This will open your profile page. It’s toward the bottom of the page. If you don’t see the option to switch accounts, update your Messenger app. It’s at the top right corner of the page. The Add an account window will pop up. You’ll need the email or phone number and password associated with the account. It’s at the bottom right of the Add an account window. The Require Password window will pop up. You’ll need to enter your password each time you switch to this account. If you don’t want to enter your password each time, tap Don’t Require. Another window will open. The Text Anyone in Your Phone window will pop up. If you don't want to enter your phone number, you can tap Not Now →Skip. This will take you to the Invite your friends to Messenger window. You can tap Learn More →Not now if you don’t want Messenger to upload your contacts. You can tap Skip at the top right corner to skip this step, or tap Invite More Later at the top of the page to perform this step at a later time. It’s at the top right corner of the screen. You’re now logged in with the account you’ve added.