Error 401--Unauthorized

Error Unauthorized Error Unauthorized From RFC Hypertext Transfer Protocol HTTP Unauthorized The request requires user authentication The response MUST include a WWW Authenticate header field section containing a challenge applicable to the requested resource The client MAY repeat the request with a suitable Authorization header field section If the request already included Authorization credentials then the response indicates that authorization has been refused for those credentials If the response contains the same challenge as the prior response and the user agent has already attempted authentication at least once then the user SHOULD be presented the entity that was given in the response since that entity MAY include relevant diagnostic information HTTP access authentication is explained in section