Control Access with Custom Claims and Security Rules     Firebase Authentication

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The Firebase Admin SDK supports defining custom attributes on user accounts. This provides the ability to implement various access control strategies, including role-based access control, in Firebase apps. These custom attributes can give users different levels of access (roles), which are enforced in an application's security rules.User roles can be defined for the following common cases:Giving a user administrative privileges to access data and resources.Defining different groups that a user belongs to.Providing multi-level access:Differentiating paid/unpaid subscribers.Differentiating moderators from regular users.Teacher/student application, etc.Add an additional identifier on a user. For example, a Firebase user could map to a different UID in another system.Let's consider a case where you want to limit access to the database node "adminContent." You could do that with a database lookup on a list of admin users. However, you can achieve the same objective more efficiently using a…