Email & password login for shared demo accounts

Shared demo accounts no longer need to sign in with a magic link or one-time password. The Product access page under Data & connections now offers a second shared-account option: point agents at an existing demo account that logs in with a fixed email and password. Like magic-link access, there's no webhook integration to build: describe the login flow in a short plain-English script, test it with one click, and you're done.

As with all shared accounts, demos run in restricted mode: the agent browses and demonstrates but is instructed not to create, modify, or delete data.