user id in order

src/emailnotification/main.go

src/highlanderticketing/db/db.go

src/highlanderticketing/handler/match.go

src/highlanderticketing/handler/order.go

src/highlanderticketing/main.go

src/highlanderticketing/model/user.go

src/highlanderticketing/service/oauth.go

src/highlanderticketing/service/order.go

src/highlanderticketing/service/travel.go

src/highlanderticketing/service/user.go