Sail.set(:my_array_setting, ["Mark", "John"])
Sail.set(:my_array_setting, "Mark;John")

Sail.get(:my_array_setting)
=> ["Mark", "John"]
Sail.get(:my_array_setting) do |setting_value|
  puts setting_value
end
=> ["Mark", "John"]

class Question < ApplicationRecord
  .
  .
  .
  def assign_question
    User.where(name: Sail.get(:mentors)) do |user|
      user.assign_question(self)
    end
  end
end