HTTP status: 401 Unauthorised
HTTP headers: WWW-Authenticate (required)
At least one challenge that indicates the authentication scheme(s) and parameters appliable to the requested address. (For example:
Content element to contain the following text:
Access to the requested address requires authorisation
An optional custom message can be included here.
Please contact us if you require further assistance with your request.
*Note: The last two actions are only applicable if the restricted resource is open for public registrations.