# File lib/etherpad-lite/models/session.rb, line 17
    def self.create(instance, group_id, author_id, length_in_min)
      valid_until = Time.now.to_i + length_in_min * 60
      result = instance.client.createSession(groupID: group_id, authorID: author_id, validUntil: valid_until)
      new instance, result[:sessionID]
    end