```ruby
class MoneyHistoryController < ApplicationController
  expose(:money_histories) { campaign.money_histories }
  expose(:user)
  expose(:campaign)

  def index
  end
end
```

Remove user expose from money history controller
user
```ruby
class MoneyHistoryController < ApplicationController
  expose(:money_histories) { campaign.money_histories }
  expose(:campaign)

  def index
  end
end
```
assistant