Update API functions to give custom image to users

[GreatGameDota]

Upload a custom image for each user where the name of the image is the user id and is in the public folder.

trackers-web/api/functions/handlers/users.js

Lines 36 to 40 in eadc37e

	idToken: token,
	displayName: req.body.handle,
	photoUrl: `https://firebasestorage.googleapis.com/v0/b/${config.storageBucket}/o/${defaultImage}?alt=media`,
	})
	.catch((err) => {