Amplify - Existing Users In Pool Cannot Authenticate with New REST API (new users can)

Question

We recently introduced a new REST api into our amplify application using `amplify add api`, `Restrict API Access? Y`,  `Auth/Guest Users: Authenticated users only`, `create, read, update, delete`.

When I attempt to access the API with a user who registered before the API was introduced, they get an "Error: Request failed with status code 403" response.

When I create a new user, they get a 200 success response.

If I remove "Restrict API Access" everyone can use the API.

How can I resolved this issue for my existing users?

Accepted Answer

Ok, I found an answer to this.  Here's a github issue that amplify-js team was nice enough to field for me.

https://github.com/aws-amplify/amplify-js/issues/11197

Restricting access by "Authenticated user" - "User needs to sign in to use the REST API" will NOT authenticate any users who have been added to a "group".   Users in "groups" need to have one or more of their Groups explicitly added to the authentication.

Answer

Is it possible you have 2 Cognito user pools? Pool A was created with your original API, and Pool B was created with your new API? That would explain the behavior with existing users. If that is the case, I think you can run `amplify import auth` and import the first pool.

Amplify - Existing Users In Pool Cannot Authenticate with New REST API (new users can)

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