guard emailAddress.text != "" , password.text != "" , fullName.text != ""
        else {
            errorOutlet.isHidden = false
            errorOutlet.text = "one or more fields are empty."
            UIApplication.shared.endIgnoringInteractionEvents()
            return SVProgressHUD.dismiss()
        }

    if password.text != "" , emailAddress.text != "" , fullName.text != "" {
   Auth.auth().createUser(withEmail: emailAddress.text! , password: password.text!, completion: { (user, error) in

    if let error = error {
        print(error.localizedDescription)
        SVProgressHUD.dismiss()
        UIApplication.shared.endIgnoringInteractionEvents()

        if let errCode = AuthErrorCode(rawValue: error._code) {
            switch errCode {

            case .emailAlreadyInUse:
                self.errorOutlet.isHidden = false
                self.errorOutlet.text = "The email you entered is already in use"

            case .invalidEmail:
                self.errorOutlet.isHidden = false
                self.errorOutlet.text = "The Email you entered is invalid"

            case .internalError:
                self.errorOutlet.isHidden = false
                self.errorOutlet.text = "An internal error occured! Try again."

            case .networkError:
                self.errorOutlet.isHidden = false
                self.errorOutlet.text = "Check your internet connection."

            case .weakPassword :
                self.errorOutlet.isHidden = false
                self.errorOutlet.text = "Your password should contain more than 7 characters"

            default : break

            }
        }
    }



    // the auth returns a user
    if let user = user {

        let changeRequest = Auth.auth().currentUser!.createProfileChangeRequest()
        changeRequest.displayName = self.fullName.text!
        changeRequest.commitChanges(completion: nil)

        let imageRef = self.userStorage.child("(user.uid).jpg")
        let data = UIImageJPEGRepresentation(self.profileImage.image!, 0.5)
        let uploadTask = imageRef.putData(data! , metadata: nil, completion: { (metadata, err) in
            if err != nil {
                print(err!.localizedDescription)

                //error


                Auth.auth().currentUser?.delete(completion: nil)
                self.errorOutlet.isHidden = false
                self.errorOutlet.text = "An error occured. Try again!"
                UIApplication.shared.endIgnoringInteractionEvents()
                SVProgressHUD.dismiss()

            }


            imageRef.downloadURL(completion: { (url , er) in
                // in case of error
                if er != nil{
                    print(er!.localizedDescription)
                    SVProgressHUD.dismiss()
                    Auth.auth().currentUser?.delete(completion: nil)
                    self.errorOutlet.isHidden = false
                    self.errorOutlet.text = "An error occured. Try again!"
                    UIApplication.shared.endIgnoringInteractionEvents()
                }