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Firebase Auth & Realtime Database Apps · Lesson

Custom Claims & Security Rules

Define custom claims for users and integrate them with Firebase Security Rules to control access to resources.

Intro to Custom Claims

Beyond basic user authentication, Firebase allows you to define Custom Claims. These are key-value pairs that you can add to a user's ID token, providing extra information about the user.

Think of them as custom labels or badges attached to a user's identity.

Why Use Custom Claims?

Custom claims are powerful for implementing role-based access control (RBAC) or granting specific permissions within your app. Instead of just knowing 'who' the user is, you can know 'what' they are allowed to do.

  • Designate users as 'admin', 'editor', or 'subscriber'.
  • Grant access to premium features or content.
  • Control data access based on custom attributes.

All lessons in this course

  1. Phone Number Authentication
  2. Multi-Factor Authentication (MFA)
  3. Custom Claims & Security Rules
  4. Account Linking & Provider Management
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