Amazon Access Key

                :path => ":class/:attachment/:hash/:style.:extension",
                    :s3_credentials => Proc.new { |a| a.instance.s3_credentials }

  def s3_credentials
    {:bucket => 'poligloton_dev', :access_key_id => "AKIAJSGYG5KUXWP7ADTA", :secret_access_key => "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"}
  end


  validates_attachment_content_type :avatar, :content_type => /\Aimage\/.*\Z/

  # associations
  belongs_to :language
  belongs_to :location
  belongs_to :creator, class_name: 'Member'
  ha

Source: http://pastebin.com/raw.php?i=adnAgikc