The Users panel

The panel on the left lists the project’s Firebase Authentication users so you can pick one instead of copying UIDs around. It appears on the tabs that act on a user: UID -> Custom Token, UID -> ID Token and User Custom Claims.

It needs a loaded service account and a Project ID. Without them it shows Load a service account and set Project ID to browse users.

Loading users

Click Load users. The app fetches users 1,000 at a time, up to 5,000 in total, and the button becomes Refresh. A counter shows how many users are loaded and how many match the search box.

Each row shows:

• the user’s email, or their phone number if they have no email, or (no email/phone),
• their display name after a dash, if they have one,
• their UID on the second line.

Click a row to select that user. The row is highlighted and the user appears under Selected UID in the top bar.

Filtering and looking up

The search box does two different things.

Typing filters the loaded list. Matching is case-insensitive and covers email, phone, display name and UID, so example keeps every @example.com user and +1555 finds phone users. Nothing is sent to Google.

Pressing Enter or clicking Lookup asks Firebase directly. Use it for users outside the loaded 5,000, or without loading the list at all. The query must be a complete value, and its form decides what is searched:

A user found this way is selected and added to the top of the list. If nobody matches, the panel says so:

Privacy

The list shows real personal data from your project: emails, phone numbers and display names. Keep that in mind before sharing your screen or a screenshot.