Amplify Queries no longer working

Question

My amplify application has been working completely fine this whole time. Now all of a sudden, after I sign the user into my application, my application just won't do any Amplify queries anymore. On attempt to perform a query, I get the error:

`Failed to query list of profiles:  APIError: The HTTP response status code is [401].
Recovery suggestion: The metadata associated with the response is contained in the HTTPURLResponse.`

When I check the response, it is empty.

I don't understand why all of a sudden it is not working anymore. It is as though AWS have blocked me from performing any Amplify queries. How do I fix this?

Answer

Hello.

When you encounter a 401 status code, it typically means "Unauthorized", suggesting that there might be an authentication or authorization issue.

If your application uses tokens for authentication (e.g., JWT tokens), ensure the token hasn't expired. Also, check if the token is being sent correctly in the request headers.

If you're using AWS Cognito for user authentication:
* Ensure the user is authenticated correctly.
* Check if the user's role has the necessary permissions to perform the query.
* Make sure the user pool and identity pool configurations haven't been accidentally changed.

Regards, Andrii

Answer

Absolutely, if your primary issue revolves around the queries post-authentication, it's worthwhile to focus on the intricacies of user pool and identity pool configurations. Here are specific areas to check in AWS Cognito:

Cognito User Pool:

a. App client settings: Make sure that the associated AppSync API is still selected under the "Enabled Identity Providers" section.

b. OAuth 2.0: Ensure that the callback and sign out URLs are still correctly configured if you are using OAuth.

c. Token expiration: By default, Cognito User Pools generate tokens that last for 1 hour. Ensure that the token hasn't expired when you are trying to make a query.

Amplify Queries no longer working

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