Flutter GetX Provider & GetConnect Settings - flutter

Question

I created a Flutter project with GetX CLI. Then i created a provider with get generate model. But i have problems with provider:
When i bind it with lazyPut, onInit() never works.
When i bind it with put, onInit() works but httpClient.defaultDecoder section does
not executed.
When i bind it with put, onInit() works and httpClient.baseUrl is adjusted but i can't read it in getFaculties. It seems like null in global.
When i put httpClient.defaultDecoder and httpClient.baseUrl in getFaculties, works well. But doesn't seem like the right way.
Am i doing something wrong or is it about GetConnect? Thanks in advance.
Provider:
class FacultyProvider extends GetConnect {
#override
void onInit() {
print('PROVIDER INIT!'); // Works with Get.put(FacultyProvider()) in Bindings
httpClient.defaultDecoder = (map) { // NEVER WORKS
if (map is Map<String, dynamic>) {
print('MAP!');
return Faculty.fromJson(map);
}
if (map is List) {
print('LIST!');
return map.map((item) => Faculty.fromJson(item)).toList();
}
};
httpClient.baseUrl = 'http://localhost:3000/public';
}
Future<List<Faculty>> getFaculties(bool cache) async {
print(httpClient.baseUrl); // ALWAYS NULL
final response = await httpClient.get('/faculties/true'); // NO HOST ERROR
return response.body; // TYPE ERRORS because of defaultDecoder section didn't run
}
Bindings:
class FacultiesBinding extends Bindings {
#override
void dependencies() {
Get.put(FacultyProvider());
// Get.lazyPut<FacultyProvider>(() => FacultyProvider());
Get.lazyPut<FacultiesController>(() => FacultiesController());
}