There are different requirements for entering Canada from countries around the world. Generally, a passport is required, and in some cases electronic travel authorizations (ETAs), Visas, or other documentation.
We have notes on a few specific jurisdictions
Visas
Note that the AT Community Fund is a project of the Raft Foundation, our fiscal sponsor, so we do not have an entity in Canada. You should be able to use your ticket registration and speaker acceptance email.