FirebaseAuth.swift

func singUp(){
    Auth.auth().createUser(withEmail: email, password: password) { (result, error) in
        guard error == nil else {
            print(error!.localizedDescription)
            return
        }
        
        print("WE have Signed Up")
    }
}

func signIn(){
    Auth.auth().signIn(withEmail: email, password: password) { (result, error) in
        guard error == nil else {
            print(error!.localizedDescription)
            return
        }
        
        print("We are Loged In")
        
    }
}