Como configurar chave de presença (smart key) honda pcx/sh150

Here's a brief tutorial on how to set up a new key on a Honda PCX. It comes with two smart keys, and we ended up losing one, leaving us with only the spare. At the dealership, the key cost R$500.00 plus R$50.00 for setup. We bought one on AliExpress for R$125.00 and I set it up myself. I looked for videos on how to set it up but couldn't find any. I hope this helps anyone with the same problem!