我得到的两个错误是：
"'async '调用不能出现在全局变量初始值设定项中"和
调用可以引发，但不能从全局变量初始值设定项中引发错误
我的代码如下：

func getReps() async{
    let apiService = APIService(urlString: (EnvSetup.baseUrl + EnvSetup.apiKey))
    
    await Task{
        let reps: [rep] = try await apiService.getJSON()
        FileManager.endcodeAndSave(objects: reps, fileName: "reps.json")
        print(reps.count)
    }
}

我尝试过不使用异步并等待，将它们添加到我的调用程序中（这只是：

async{
    await @Published var Reps: [rep] = getReps()
}

这是我第一次在Swift中使用API，所以这可能是一个简单的文件结构问题，但我已经在这方面工作了几个小时，没有任何效果。我将感谢任何帮助!
我试过修改async和await命令，但是，我总是得到同样的错误。我使用的APIService代码是Stewart Lynch的，如下所示：

import Foundation

public class APIService {
    public let urlString: String
    public init(urlString: String) {
        self.urlString = urlString
    }
    
    public func getJSON<T: Decodable>( dateDecodingStategy: JSONDecoder.DateDecodingStrategy = .deferredToDate,
                                       keyDecodingStrategy: JSONDecoder.KeyDecodingStrategy = .useDefaultKeys,
                                       completion: @escaping (T) -> Void) {
        guard let url = URL(string: urlString) else {
            fatalError("Error: Invalid URL.")
        }
        let request = URLRequest(url: url)
        URLSession.shared.dataTask(with: request) { (data, response, error) in
            if let error = error {
                fatalError("Error: \(error.localizedDescription)")
            }
            guard let data = data else {
                fatalError("Error: Data is corrupt.")
            }
            let decoder = JSONDecoder()
            decoder.dateDecodingStrategy = dateDecodingStategy
            decoder.keyDecodingStrategy = keyDecodingStrategy
            
            do {
                let decodedData = try decoder.decode(T.self, from: data)
                completion(decodedData)
            } catch {
                fatalError("Error: \(error.localizedDescription)")
            }
        }.resume()
    }
    
    @available(iOS 14, *)
    public func getJSON<T: Decodable>(dateDecodingStategy: JSONDecoder.DateDecodingStrategy = .deferredToDate,
                                      keyDecodingStrategy: JSONDecoder.KeyDecodingStrategy = .useDefaultKeys) async throws -> T {
        guard let url = URL(string: urlString) else {
           fatalError("Error: Invalid URL.")
        }
        let request = URLRequest(url: url)
        let (data, response) = try await URLSession.shared.data(for: request)
        guard let _ = response as? HTTPURLResponse else {
            fatalError("Error: Data Request error.")
        }
        let decoder = JSONDecoder()
        decoder.dateDecodingStrategy = dateDecodingStategy
        decoder.keyDecodingStrategy = keyDecodingStrategy
        guard let decodedData =  try? decoder.decode(T.self, from: data) else {
           fatalError("Error: Decoding error.")
        }
        return decodedData
    }
}