Where is the side key option for Samsung pay

[Kimpro]

Why the Samsung removed side key option for Samsung pay ??

I just know that after several hours googling 

[Charkatak · Accepted solution]

When you press and hold power button, don't you have side key settings button at the bottom?

Alternatively you can go to settings and search for side key. Select the Side Key option and there is an option to Open App. You can chose to open Samsung Pay here.

[Kimpro]

I mean there is no option available for assignment of Samsung Pay in side key setting.

[Kimpro]

Samsung Reps recommended me to leave messages here