If you cannot find a record of your password (as indicated, it's a good idea to have passwords written or recorded somewhere), one thing you could do is make sure your new i-phone is set up as a new device i.e. a different name. That should be considered a new device and you should be able to set up a new share to your camera.
cheers, TREVOR
Before you ask us, have you looked in the manual or on the Canon Support Site?
"All the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
