Handling User Signout

Upon successful authentication, the user is automatically signed in to our application. The Firebase Authentication SDK provides functions for handling user sign-out.

To sign a user out, we need to call the signOut function. This function is imported from the firebase/auth subpackage and takes the initialized authentication instance as a parameter. This function is asynchronous, and it returns a JavaScript promise that we can use to handle the function’s success value or failure reason: