injected firebase service into waitlist controller & created a reference to firebase application & passed reference to firebase service & used firebase add method
injected firebase service into waitlist controller & created a reference to firebase application & passed reference to firebase service & used firebase add method

MilanGrubnic70/angular_course,MilanGrubnic70/angular_course,MilanGrubnic70/angular_course,MilanGrubnic70/angular_course