Credit usage by API key

curl -X GET \
  'https://api.boltroute.ai/api/v1/credits/usage/api-keys?from=2025-01-01T00:00:00Z&to=2025-01-03T00:00:00Z' \
  -H 'Authorization: Bearer <api_key_or_jwt>'

{
  "user_id": "550e8400-e29b-41d4-a716-446655440000",
  "from": "2025-01-01T00:00:00Z",
  "to": "2025-01-03T00:00:00Z",
  "keys": [
    {
      "api_key_id": "550e8400-e29b-41d4-a716-446655440000",
      "api_key_name": "Production key",
      "api_key_purpose": "zapier",
      "is_active": true,
      "is_unknown": false,
      "totals": { "used_credits": 10, "granted_credits": 5, "net_credits": 5 },
      "series": [
        { "date": "2025-01-01", "used_credits": 10, "granted_credits": 0, "net_credits": 10 },
        { "date": "2025-01-02", "used_credits": 0, "granted_credits": 5, "net_credits": -5 },
        { "date": "2025-01-03", "used_credits": 0, "granted_credits": 0, "net_credits": 0 }
      ]
    },
    {
      "is_unknown": true,
      "totals": { "used_credits": 3, "granted_credits": 0, "net_credits": 3 },
      "series": [
        { "date": "2025-01-01", "used_credits": 0, "granted_credits": 0, "net_credits": 0 },
        { "date": "2025-01-02", "used_credits": 0, "granted_credits": 0, "net_credits": 0 },
        { "date": "2025-01-03", "used_credits": 3, "granted_credits": 0, "net_credits": 3 }
      ]
    }
  ]
}