{
  "token": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9..."
}

{
  "success": true,
  "data": {
    "user": {
      "id": "550e8400-e29b-41d4-a716-446655440000",
      "email": "user@example.com",
      "dynamicUserId": "dyn_123456",
      "tier": "silver"
    },
    "sessionId": "sess_abc123xyz"
  }
}