RefreshTokenMethod.swift

func refreshToken(completion: @escaping (_ isSuccess: Bool) -> Void) {
    guard let apiKey = UserDefaultsManager.shared.getUserCredentials().apiKey,
        let secretKey = UserDefaultsManager.shared.getUserCredentials().secretKey else { return }
    let parameters = ["grant_type": "client_credentials", "client_id": apiKey, "client_secret": secretKey]
    AF.request(authorize, method: .post, parameters: parameters, encoding: JSONEncoding.default).responseJSON { response in
        if let data = response.data, let token = (try? JSONSerialization.jsonObject(with: data, options: [])
            as? [String: Any])?["access_token"] as? String {
            UserDefaultsManager.shared.setToken(token: token)
            print("\nRefresh token completed successfully. New token is: \(token)\n")
            completion(true)
        } else {
            completion(false)
        }
    }
}