<p>Modifies an account setting. Account settings are set on a per-Region basis.</p> <p>If you change the root user account setting, the default settings are reset for users and roles that do not have specified individual account settings. For more information, see <a href="https://docs.aws.amazon.com/AmazonECS/latest/developerguide/ecs-account-settings.html">Account Settings</a> in the <i>Amazon Elastic Container Service Developer Guide</i>.</p> <p>When <code>serviceLongArnFormat</code>, <code>taskLongArnFormat</code>, or <code>containerInstanceLongArnFormat</code> are specified, the Amazon Resource Name (ARN) and resource ID format of the resource type for a specified user, role, or the root user for an account is affected. The opt-in and opt-out account setting must be set for each Amazon ECS resource separately. The ARN and resource ID format of a resource is defined by the opt-in status of the user or role that created the resource. You must turn on this setting to use Amazon ECS features such as resource tagging.</p> <p>When <code>awsvpcTrunking</code> is specified, the elastic network interface (ENI) limit for any new container instances that support the feature is changed. If <code>awsvpcTrunking</code> is turned on, any new container instances that support the feature are launched have the increased ENI limits available to them. For more information, see <a href="https://docs.aws.amazon.com/AmazonECS/latest/developerguide/container-instance-eni.html">Elastic Network Interface Trunking</a> in the <i>Amazon Elastic Container Service Developer Guide</i>.</p> <p>When <code>containerInsights</code> is specified, the default setting indicating whether Amazon Web Services CloudWatch Container Insights is turned on for your clusters is changed. If <code>containerInsights</code> is turned on, any new clusters that are created will have Container Insights turned on unless you disable it during cluster creation. For more information, see <a href="https://docs.aws.amazon.com/AmazonECS/latest/developerguide/cloudwatch-container-insights.html">CloudWatch Container Insights</a> in the <i>Amazon Elastic Container Service Developer Guide</i>.</p> <p>Amazon ECS is introducing tagging authorization for resource creation. Users must have permissions for actions that create the resource, such as <code>ecsCreateCluster</code>. If tags are specified when you create a resource, Amazon Web Services performs additional authorization to verify if users or roles have permissions to create tags. Therefore, you must grant explicit permissions to use the <code>ecs:TagResource</code> action. For more information, see <a href="https://docs.aws.amazon.com/AmazonECS/latest/developerguide/supported-iam-actions-tagging.html">Grant permission to tag resources on creation</a> in the <i>Amazon ECS Developer Guide</i>.</p>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}