Some websites might make your life a whole lot easier. This is an opinionated list.
You can find the website here.
You can have codeshare create a new url for you but this will usually be one that is non human readable. You can also create your own temporary link yourself;
Usually these links are more convenient. Keep in mind that everyone can delete lines of code as well as add them and that this website is available to everybody with the link.
Do not share passwords via this service.
Feedback? See an issue? Something unclear? Feel free to mention it here.
If you want to be kept up to date, consider signing up for the newsletter.