httpGet.swift

func httpGetApi () {
        
        let parameters: Parameters = ["username": "username", "password": "password"]
    
        Alamofire.request("addr", method: .post, parameters:parameters, encoding: JSONEncoding.default)
            .responseJSON{response in
                if let json = response.result.value as? [String: String] {
                    self.setApiKey(apiKey: json["api_key"]!)
                }else{
                    self.setMessage(statusMessage: "Ei toimi")
                }
        }
    }
    
    func httpGetPodCasts (parserObserver: DataParserObserver) {
        httpGetApi()
        let parameters: Parameters = ["key": self.getApiKey(), "category": ""]
        var podcasts: [Podcast] = [Podcast]()
      .....
    }

In tableview,
 override func viewDidLoad() {
        super.viewDidLoad()
        self.podcasts = [Podcast]()
        let dataParser = HttpRequesting()
        
        dataParser.httpGetPodCasts(parserObserver: self)
        
    }