make hubconnection.start() only once in the whole app - flutter

Question

I am using the singalR package in order to use websocket in my application. During the writing of my program, I was advised to use await hubconnection.start only once and throughout the whole application. Is it possible? I thought that I could run this task somehow in the background and not make every websocket request start every time I want to use some kind of request. Is this possible or is this the wrong idea?
now I an trying to split up the whole thing and found out that in initState we can create method which will be start first before all others code in app, so I decided to split it up like that(in educational purpose I declaired connection setting globally in my file)
final httpConnectionOptions = HttpConnectionOptions(
accessTokenFactory: () => SharedPreferenceService().loginWithToken(),
skipNegotiation: true,
transport: HttpTransportType.WebSockets);
final hubConnection = HubConnectionBuilder()
.withUrl(
'http://secureLink/mysocket',
options: httpConnectionOptions,
)
.build();
this is my class:
class TestClass extends StatefulWidget {
bool? gpsenabled;
TestClass({Key? key}) : super(key: key);
#override
State<TestClass> createState() => _TestClassState();
}
class _TestClassState extends State<TestClass> {
void checkGPS() async {
if (hubConnection.state == HubConnectionState.Connected) {
await hubConnection.invoke('GPSEnable').then((value) {
setState(() {
widget.gpsenabled = value as bool;
});
print(widget.gpsenabled);
Future.delayed(Duration(seconds: 5));
checkGPS();
});
}
}
#override
void initState() {
WidgetsBinding.instance.addPostFrameCallback((_) {
hubConnection.start();
print('connection first');
});
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Column(