Xcode compactMap returning empty array with decodable - json

Question

I encoded my IGNotification array into a dictionary and am trying to decode the array into data while performing a compactMap on IGNotification. I expect the data to be displayed on a tableView but instead the array is empty. Does anyone know why this is happening?
below is the getNotifications function that has the compact map along with my Decodable extension.
getNotifications function:
public func getNotifications(
completion: #escaping ([IGNotification]) -> Void
) {
guard let username = UserDefaults.standard.string(forKey: "username") else {
completion([])
return
}
let ref = firestoreDatabase.collection("users").document(username).collection("notifications")
ref.getDocuments { snapshot, error in
guard let notifications = snapshot?.documents.compactMap({
IGNotification(with: $0.data())
}),
error == nil else {
completion([])
return
}
completion(notifications)
print(notifications)
}
}
Decodable extension:
extension Decodable {
/// Create model with dictionary
/// - Parameter dictionary: Firestore data
init?(with dictionary: [String: Any]) {
print("executed")
guard let data = try? JSONSerialization.data(
withJSONObject: dictionary,
options: .prettyPrinted
) else {
return nil
}
print("result")
guard let result = try? JSONDecoder().decode(
Self.self,
from: data
) else {
return nil
}
self = result
print("executed")
}
}