Get customer usage summary

curl --request GET \
  --url https://api.cloud.flexprice.io/v1/customers/{id}/usage \
  --header 'x-api-key: <api-key>'

{
  "customer_id": "<string>",
  "features": [
    {
      "current_usage": 123,
      "feature": {
        "created_at": "<string>",
        "created_by": "<string>",
        "description": "<string>",
        "environment_id": "<string>",
        "id": "<string>",
        "lookup_key": "<string>",
        "metadata": {},
        "meter": {
          "aggregation": {
            "field": "<string>",
            "type": "COUNT"
          },
          "created_at": "2024-03-20T15:04:05Z",
          "event_name": "api_request",
          "filters": [
            {
              "key": "<string>",
              "values": [
                "<string>"
              ]
            }
          ],
          "id": "550e8400-e29b-41d4-a716-446655440000",
          "name": "API Usage Meter",
          "reset_usage": "BILLING_PERIOD",
          "status": "published",
          "tenant_id": "tenant123",
          "updated_at": "2024-03-20T15:04:05Z"
        },
        "meter_id": "<string>",
        "name": "<string>",
        "status": "published",
        "tenant_id": "<string>",
        "type": "metered",
        "unit_plural": "<string>",
        "unit_singular": "<string>",
        "updated_at": "<string>",
        "updated_by": "<string>"
      },
      "is_enabled": true,
      "is_soft_limit": true,
      "sources": [
        {
          "entitlement_id": "<string>",
          "is_enabled": true,
          "plan_id": "<string>",
          "plan_name": "<string>",
          "quantity": 123,
          "static_value": "<string>",
          "subscription_id": "<string>",
          "usage_limit": 123
        }
      ],
      "total_limit": 123,
      "usage_percent": 123
    }
  ],
  "pagination": {
    "limit": 123,
    "offset": 123,
    "total": 123
  },
  "period": {
    "end_time": "<string>",
    "period": "<string>",
    "start_time": "<string>"
  }
}