signup_page.dart

  Future signUp() async {
    _formKey.currentState.save();
    _formKey.currentState.validate();

    if (!_formKey.currentState.validate()) {
      return;
    }
    offKeyboard(context);

    setState(() {
      isLoading = true;
    });
    await _auth
        .createUserWithEmailAndPassword(
            email: emailController.text, password: passwordController.text)
        .then((value) {
      User user = value.user;

      if (value.user != null) {
        user.sendEmailVerification().then((v) {}).catchError((e) {
          showExceptionAlertDialog(context: context, exception: e, title: "Error".tr());
          setState(() {
            isLoading = false;
          });
        });
      } else {
        setState(() {
          isLoading = false;
        });
      }
      return;
    }).catchError((e) {
      showExceptionAlertDialog(context: context, exception: e, title: "Error".tr());
      setState(() {
        isLoading = false;
      });
      return;
    });
  }