You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: calendar_controller.rb
    path of file: ./repos/msgraph-sample-rubyrailsapp/graph-sample/app/controllers
    
    the code of the file until where you have to start completion: # Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
# frozen_string_literal: true

# Calendar controller
class CalendarController < ApplicationController
  include GraphHelper

  def index
    # Get the IANA identifier of the user's time zone
    time_zone = get_iana_from_windows(user_timezone)

    # Calculate the start and end of week in the user's time zone
    start_datetime = Date.t
    
  def create
    # Semicolon-delimited list, split to an array
    attendees = params[:ev_attendees].split(';')

    # Create the event
    create_event access_token,
                 user_timezone,
                 params[:ev_subject],
                 params[:ev_start],
                 params[:ev_end],
                 attendees,
                 params[:ev_body]

    # Redirect back to the calendar list
    redirect_to({ action: 'index' })
  rescue RuntimeError => e
    @errors = [
      {
        message: 'Microsoft Graph returned an error creating the event.',
        debug: e
      }
    ]
  end