DynamicMemberLookupSample.swift

import Foundation

@dynamicMemberLookup
struct AppConfig {
    
    let weatherApiKey: String = ""
    
    private init() {}
    
    static subscript<T>(dynamicMember keyPath:KeyPath<AppConfig, T>) -> T {
        AppConfig()[keyPath: keyPath]
    }
}

//MARK: Accessing the data (Autocomplete does not work due to dynamicMemberLookup)
let key = AppConfig.weatherApiKey