You can add login with Firebase see https://observablehq.com/@tomlarkworthy/firebase https://observablehq.com/@tomlarkworthy/firebase or a full example https

You can add login with Firebase see https://observablehq.com/@tomlarkworthy/firebase https://observablehq.com/@tomlarkworthy/firebase or a full example https://observablehq.com/@tomlarkworthy/chat-application https://observablehq.com/@tomlarkworthy/chat-application