Azure Functions with SharePoint Online CSOM C#

run.csx

#r "Microsoft.SharePoint.Client.Runtime.dll"
#r "Microsoft.SharePoint.Client.dll"

using System;
using System.Security;
using System.Configuration;
using Microsoft.SharePoint.Client;

public static void Run(TimerInfo myTimer, TraceWriter log)
{
            
            string userName = ConfigurationManager.AppSettings["User"];
            string password = ConfigurationManager.AppSettings["Pass"];
            string spSite = ConfigurationManager.AppSettings["SharePointSiteUrl"];
            const string listName = "List00";
            const string listNameDestination = "List01";

            log.Info($"Trigger function executed at: {DateTime.Now}  with {userName} | {password} on {spSite}");
            using (ClientContext ctx = new ClientContext(spSite))
            {
                // Authenticating to SPO
                SecureString securePassword = new SecureString();
                foreach (char c in password.ToCharArray())
                    securePassword.AppendChar(c);
                ctx.Credentials = new SharePointOnlineCredentials(userName, securePassword);

                // Getting all SPO list items 
                List myList = ctx.Web.Lists.GetByTitle(listName);
                CamlQuery query = CamlQuery.CreateAllItemsQuery(100);
                ListItemCollection collListItem = myList.GetItems(query);
                ctx.Load(collListItem);
                ctx.ExecuteQuery();

                // Destination list item - create list items 
                List destinationList = ctx.Web.Lists.GetByTitle(listNameDestination);
                ListItemCreationInformation itemCreateInfo;

                foreach (ListItem oListItem in collListItem)
                {
                    // Getting list item 
                    string customColumnValue = Convert.ToString(oListItem["CustomColumn"]);
                    log.Info($" List Item retrieved from {listName} => {customColumnValue}");

                    // Writing values to destination list which are retrieved 
                    if (!string.IsNullOrEmpty(customColumnValue)){
                        itemCreateInfo = new ListItemCreationInformation();
                        ListItem newItem = destinationList.AddItem(itemCreateInfo);
                        newItem["Title"] = customColumnValue;
                        newItem.Update();
                        log.Info($" Updating column Title with {listNameDestination} with {customColumnValue}");
                        ctx.ExecuteQuery();
                    }

                }
            }
}