Apple, Google and Meta Platforms are among the tech companies that provide digital-legacy tools to let users bequeath account access to others, but millions of people are poised to change how they log into accounts as FIDO passwordless technology is rolled out. But those passkeys aren’t set up yet for sharing with heirs or next of kin. In the future, they could allow users to designate emergency contacts who can access your accounts through their own unique passkeys after verifying their identity. Alternatively, apps and websites may let you keep a traditional password as a backup.