Alamofire and TableView/CollectionView - swift

Question

I created a reusable Alamofire request which works smoothly. I am trying to get the data from the request Decode it(works fine too) and append it to one of my arrays to display in tableView/collectionView.
I am using MVVM and I append my data in viewModel(you can see below). The thing is I have tableView in my viewController and inside my tableView methods( viewForSupplementaryElementOfKind for instance) the 'stories'(from viewModel) are always empty.
In my viewDidLoad method I call getMainPageData(from viewModel) first and then create my tableView. I assure you the request itself is a success, the only problem is displaying the data.
Please keep in mind that the project has many API calls so I need a solution which will work in all cases when I have to deal with "lists". Thank you in advance
class NetworkManager {
let keychain = KeychainManager()
let base = "SomeBase"
let storageManager = StorageManager()
func setupRequest(path: Paths, method: RequestMethod, body: Encodable? = nil, params: [String: Any]? = nil, header: HeaderType, completion: #escaping((Result<Data,NetworkError>) -> Void)) {
var queries = ""
if let params = params {
queries = params.passingQuery()
}
let url = URL(string: base + path.rawValue + queries)
var request = URLRequest(url: url!)
request.httpMethod = method.rawValue
request.setValue(header.value[0].value, forHTTPHeaderField: "Content-Type")
if let userToken = keychain.getAccessToken(), userToken.count > 0 {
request.setValue("Bearer " + userToken, forHTTPHeaderField: "Authorization")
}
if let body = body {
if let jsonData = body.toJSONData() {
request.httpBody = jsonData
}
}
AF.request(request).validate().responseJSON { response in
if (200...299) ~= response.response?.statusCode ?? -1 {
self.handlingHeaders(response: response)
completion(.success(response.data!))
} else {
do {
if let data = response.data {
let json = try JSONDecoder().decode(ErrorResponse.self, from: data)
completion(.failure(.responseError(json.message)))
}
} catch {
completion(.failure(.serverError))
}
}
}
}
private func handlingHeaders(response: AFDataResponse<Any>) {
let headers = response.response?.headers
if let accessToken = headers?.dictionary["Authorization"] {
keychain.saveToken(token: accessToken)
}
}
}
extension Encodable {
func toJSONData() -> Data? { try? JSONEncoder().encode(self) }
}
var stories = [Story]()
func getMainPageData(completion: #escaping(Result<Void, NetworkError>) -> ()) {
networkManager.setupRequest(path: .mainPageData, method: .get, body: nil, params: nil, header: .application_json) { [self] result in
switch result {
case .success(let data):
do {
let homePageData = try JSONDecoder().decode(MainPageResponse.self, from: data)
stories.append(contentsOf: homePageData.model.stories)