AWS Cognito NotAuthorizedException

AWS Cognito is a service that provides user authentication and authorization for your applications. One of the exceptions that you may encounter when using Cognito is the NotAuthorizedException. In this guide, we will take a closer look at this exception, what it means, and how you can handle it in your applications.

What is NotAuthorizedException?

NotAuthorizedException is an exception that is thrown when a user is not authorized to perform a particular action. For example, if a user tries to access a resource that requires authentication, but they are not signed in, Cognito will throw a NotAuthorizedException. Similarly, if a user tries to access a resource that they do not have permission to access, Cognito will also throw this exception.

Handling NotAuthorizedException

When you encounter a NotAuthorizedException, you will need to handle it in your code. One common way to handle this exception is to redirect the user to the login page so that they can authenticate themselves. You can also display an error message or notification to the user, letting them know that they are not authorized to perform the action they are trying to perform.

Here is an example of how you can handle a NotAuthorizedException in JavaScript:

try {
  // Make a request to a restricted resource
} catch (e) {
  if (e instanceof AWS.CognitoIdentityServiceProvider.NotAuthorizedException) {
    // Redirect to the login page
  } else {
    // Handle other exceptions
  }
}

In this example, we are catching the NotAuthorizedException thrown by Cognito and redirecting the user to the login page. If any other exception is thrown, we will handle it differently.

Conclusion

NotAuthorizedException is a common exception that you may encounter when working with AWS Cognito. It is important to handle this exception properly in your code to ensure that your users have a smooth experience while using your application. Remember to always check for this exception and redirect the user to the login page or display an error message when it is thrown.