// firebase login
Row(
    mainAxisAlignment: MainAxisAlignment.spaceAround,
            children:[
            RaisedButton(
              color: Theme.of(context).accentColor,
              child: Text('Signin'),
              onPressed: (){
                  auth.signInWithEmailAndPassword(email: _email, password: _password).then((_){
                    Navigator.of(context).pushReplacement(MaterialPageRoute(builder: (context) => HomeScreen()));
                  });
                  
            }),
            RaisedButton( 
              color: Theme.of(context).accentColor,
              child: Text('Signup'),
              onPressed: (){
                auth.createUserWithEmailAndPassword(email: _email, password: _password).then((_){
                  Navigator.of(context).pushReplacement(MaterialPageRoute(builder: (context) => HomeScreen()));
                });
                
              },
            )
          ])


            FocusScope.of(context).requestFocus(FocusNode());
