def send_sessions
      sessions = []
      counts = @session_counts
      @session_counts = Concurrent::Hash.new(0)
      counts.each do |min, count|
        sessions << {
          :startedAt => min,
          :sessionsStarted => count
        }
      end
      deliver(sessions)
    end
def send_sessions
      sessions = []
      counts = @session_counts
      @session_counts = Concurrent::Hash.new(0)
      counts.each do |min, count|
        sessions << {
          :startedAt => min,
          :sessionsStarted => count
        }
      end
      deliver(sessions)
    end
Delivers the current session_counts lists to the session endpoint.