Unable to perform config:PutEvaluations due to the lack of permissions on the role

Question

Hello I am trying to add AWS Config in Terraform. I've set up the following policy attachment like so:

resource aws_iam_policy policy {
    name = "test-policy"
    policy = <<POLICY
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": [
        "config:PutEvaluations",
        "config:PutConfigRule",
        "config:DeleteConfigRule",
        "config:GetComplianceDetailsByConfigRule",
        "config:DescribeConfigRuleEvaluationStatus"
      ],
      "Effect": "Allow",
      "Resource": [
        "arn:aws:config:*:*:config-rule/aws-service-rule/*securityhub*"
      ]
    }
  ]
}
POLICY
}

I've verified that the policy in AWS matches the policy attachment as prescribed above. However, when I visit the AWS Config service in the console I get the following error for each of my config rules:

Unable to perform config:PutEvaluations due to the lack of permissions on the role.

I haven't found any good resources on this issue. I've been scouring around, but nothing has turned up. I only came across this article: https://aws.amazon.com/premiumsupport/knowledge-center/config-error-security-hub/. Any help with this issue would be greatly appreciated. For reference I am attaching the policy to the IAM role like so:

resource aws_iam_role_policy_attachment "test-attach" {
    role = aws_iam_role.config.name
    policy_arn = aws_iam_policy.policy.arn
}

resource aws_iam_role config {
  name = "myconfig"

  assume_role_policy = <<POLICY
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": "sts:AssumeRole",
      "Principal": {
        "Service": "config.amazonaws.com"
      },
      "Effect": "Allow",
      "Sid": ""
    }
  ]
}
POLICY
}

Answer 1

I was able to solve my own problem

resource aws_iam_role_policy_attachment "test-attach" {
    role = aws_iam_role.config.name
    policy_arn = "arn:aws:iam::aws:policy/service-role/AWSConfigRole"
}

I used the policy listed in IAM Role Policy for Getting Configuration Details in this document https://docs.aws.amazon.com/config/latest/developerguide/iamrole-permissions.html