CarrierWave.configure do |config|  
  config.fog_credentials = {
    provider:"AWS",    
           aws_access_key_id: ENV["AWS_ACCESS_KEY_ID"],    
           aws_secret_access_key: ENV["AWS_SECRET_ACCESS_KEY"],
           region: 'sa-east-1'
      }  
  config.fog_directory = ENV["AWS_S3_BUCKET"]
end