Create simple service which get all hanami contributors
user
```ruby
require_relative '../../http_request'

class AllContributors
  API_URL = 'https://api.github.com/repos/hanami/%{project}/stats/contributors'.freeze

  def call
    contributors = []

    ProjectRepository.new.all.each do |project|
      get_response(project).each { |data| contributors << contributor_data(data) }
    end

    contributors.uniq { |contributor| contributor[:github] }
  end

  private

  def contributor_data(data)
    { 
      github: data['author']['login'],
      avatar_url: data['author']['avatar_url']
    }
  end

  def get_response(project)
    params = { project: project.name }

    response = HttpRequest.new(API_URL % params).get
    return [] unless response.is_a?(Net::HTTPSuccess)

    JSON.parse(response.body)
  end
end
```
assistant