OAuth Authorization Flow

AuthenticationSessionManager.swift

    public func authRequest(_ urlRequest: URLRequest, responseJSON: @escaping (DataResponse<Any>) -> Void) -> DataRequest {
        
        if isAccessTokenValid  {
            return self.makeRequest(url: urlRequest).validate().responseJSON(completionHandler: responseJSON)
        } else {
            return refreshToken(urlRequest: urlRequest, { [weak self] (success) in                                                       
                                                         
                guard success else {
                   responseJSON(DataResponse(request: urlRequest, response: nil, data: nil, result: Result.failure(error)))  
                   return 
                }                               
                self.makeRequest(url: urlRequest).validate().responseJSON(completionHandler: responseJSON)
            })
        }
    }