To obtain temporary AWS credentials for an unauthenticated role in PowerShell using a Cognito IdentityPool, you can use the AWS PowerShell SDK and the Get-CognitoIdentity cmdlet. Here are the steps:
Install the AWS PowerShell SDK if you haven't already. You can do this by running the following command in PowerShell:
Install-Module -Name AWSPowerShell.NetCore
Create an IdentityPool in the AWS Console and note its ID.
Set up an IAM Role with permissions to access the AWS resources you need, and make sure to enable the "Allow access from unauthenticated identities" option.
In your PowerShell script, use the following code to get temporary credentials:
# Import the AWS PowerShell module
# Set up the parameters for the Get-CognitoIdentity cmdlet
$IdentityPoolId = "<your IdentityPool ID>"
$AccountId = "<your AWS Account ID>"
$RoleArn = "<your IAM Role ARN>"
# Get a new Cognito identity ID
$IdentityId = (Get-CognitoIdentity -IdentityPoolId $IdentityPoolId).IdentityId
# Get temporary AWS credentials for the unauthenticated role
$Credentials = Get-CognitoIdentityCredentials -IdentityId $IdentityId -AccountId $AccountId -RoleArn $RoleArn
# Use the credentials to access the AWS resource (e.g. S3 bucket)
Get-S3Object -BucketName "<your S3 bucket name>" -Key "<your object key>" -Credential $Credentials
Replace the values for $IdentityPoolId, $AccountId, $RoleArn, <your S3 bucket name>, and <your object key> with your own values.
Run the script and you should be able to access your AWS resource using temporary credentials obtained through Cognito.
Note that the temporary credentials obtained through Cognito have an expiration time, so you will need to refresh them periodically to continue accessing your AWS resource.
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