amplify mock function: Getting "Not Authorized to access listTodos on type Query" on following the "Call a graphql API from a lambda function" docs

[fadone]

How did you install the Amplify CLI?

npm

If applicable, what version of Node.js are you using?

22.13.1

Amplify CLI Version

13.0.1

What operating system are you using?

Windows

Did you make any manual changes to the cloud resources managed by Amplify? Please describe the changes made.

No

Describe the bug

I am getting the following error when following the Call a GraphQL API from a Lambda function on amplify mock function.

{
  "statusCode": 400,
  "body": "{\"data\":{\"listTodos\":null},\"errors\":[{\"path\":[\"listTodos\"],\"data\":null,\"errorType\":\"Unauthorized\",\"errorInfo\":null,\"locations\":[{\"line\":3,\"column\":5,\"sourceName\":null}],\"message\":\"Not Authorized to access listTodos on type Query\"}]}"
}

My default authorization mode is set to IAM. Here's my schema.graphql:

type Todo @model @auth(rules: [{ allow: private, provider: iam }]) {
  name: String
  description: String
}

Expected behavior

It should return a list of todo items.

Reproduction steps

1. Follow the docs: Call a GraphQL API from a Lambda function
   
2. Run amplify mock function myfunction.
3. You will get the above error message.

Project Identifier

9e43d72a6f7f950e19659de7e5e77774

Log output

# Put your logs below this line

Ensuring latest function changes are built...
Starting execution...
(node:1476) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `amplify --trace-deprecation ...` to show where the warning was created)
EVENT: {"key1":"value1","key2":"value2","key3":"value3"}
✅ Result:
{
  "statusCode": 400,
  "body": "{\"data\":{\"listTodos\":null},\"errors\":[{\"path\":[\"listTodos\"],\"data\":null,\"errorType\":\"Unauthorized\",\"errorInfo\":null,\"locations\":[{\"line\":3,\"column\":5,\"sourceName\":null}],\"message\":\"Not Authorized to access listTodos on type Query\"}]}"
}
Finished execution.

Additional information

No response

Before submitting, please confirm:

• I have done my best to include a minimal, self-contained set of instructions for consistently reproducing the issue.
• I have removed any sensitive information from my code snippets and submission.

[fadone]

Took me 3 days to findout the issue is in the amplify mock function. Although, we have granted the resource access permissions for graphql. It's working in the cloud. It would be great if we can test it locally.