Not able to call fromCognitoIdentityPool on iOS (browser)

[raRaRa]

Describe the bug

I just noticed that Chrome on iOS devices fails when calling fromCognitoIdentityPool. But it works on my desktop machine just fine with Chrome and Safari.

Example code:

    this.cachedCredentials = await fromCognitoIdentityPool({
      // Required. The unique identifier for the identity pool from which an identity should be
      // retrieved or generated.
      identityPoolId: this.options.IdentityPoolId,
      clientConfig: { region: this.options.Region },
    })();

The error I get:

DEBUG endpoints Resolving endpoint from template: {
  "url": "https://cognito-identity.{Region}.{PartitionResult#dnsSuffix}",
  "properties": {},
  "headers": {}
}

ERROR[object Object]

I believe the error is related to TypeError: JSON.stringify cannot serialize cyclic structures

Expected Behavior

I expect it to run through the last step where it errors out, which should resolve to:

endpoints Resolved endpoint: {
  "headers": {},
  "properties": {},
  "url": "https://cognito-identity.eu-west-1.amazonaws.com/"
}

Current Behavior

Currently it errors on

DEBUG endpoints Resolving endpoint from template: {
  "url": "https://cognito-identity.{Region}.{PartitionResult#dnsSuffix}",
  "properties": {},
  "headers": {}
}

Reproduction Steps

Just run fromCognitoIdentityPool from Chrome in iOS

Possible Solution

No response

Additional Information/Context

@aws-sdk/credential-providers is on version 3.664.0

SDK version used

1.21.1

Environment details (OS name and version, etc.)

iPhone 13 Pro, Google Chrome

[bretambrose]

I'm not following how this is an issue with the IoT SDK.

[raRaRa]

I'm not following how this is an issue with the IoT SDK.

I wasn't sure where to report this. The samples use fromCognitoIdentityPool but they no longer work on Chrome in iOS. Do you know of any alternative ways to use cognitio identity pool without using fromCognitoIdentityPool

Should I report this to @aws-sdk/credential-providers

[bretambrose]

Should I report this to @aws-sdk/credential-providers

That seems like it would get the best results. I'm not sure of the support status of that major version though.

[raRaRa]

Seems like it's a bug within some library that aws-sdk uses. I've created a separated report in the aws-sdk repo.
I also solved this by manually fetching the AWS Cognito identity and credentials without using the fromCognitoIdentityPool method.

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