Getting accountID from resolvers

To get the AWS account ID from a Velocity Template Language (VTL) resolver in AWS AppSync, you can use the $util.awsAccountId() utility function provided by AWS AppSync VTL. This function returns the AWS account ID associated with the current execution context.

Here's an example of how you can use it in your resolver:

#set($accountId = $util.awsAccountId())
{
  "accountId": "$accountId"
}

here, $util.awsAccountId() is called to retrieve the AWS account ID, and the value is assigned to the $accountId variable. Then, the account ID is returned as part of the response object.

You can include this VTL code in the response mapping template of your resolver to dynamically fetch the AWS account ID during each resolver execution.