Returns error that server cannot or will not process the request due to something that is perceived to be a client error.

Error status response code indicates that the request has not been applied because it lacks valid authentication credentials for the target resource.

Error that access is forbidden and tied to the application logic, such as insufficient rights to a resource.

Returns error indicating that server can't find requested resource.

Returns error response code indicates that the server encountered an unexpected condition that prevented it from fulfilling the request.

Returns error response code indicates that the server is not ready to handle the request.