You can add or remove a social profile, such as Twitter (X), from your profile as long as you are logged in and have confirmed that you own your account.
Requirements:
Option 1: In the header, you can edit your socials by clicking on the pencil ✏️ icon to add your social profile as a copy/paste. You can then add, remove, or edit an existing entry.
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Click on the pencil icon next to the profile picture

Click on the pencil icon at the top next to profiles

Add or modify any existing social profile by adding in the profile URL.