The request has not been applied in light of the fact that it needs substantial verification accreditations for the objective asset. 

The server producing a 401 reaction MUST send a WWW-Authenticate header field containing in any event one test relevant to the objective asset. 

On the off chance that the request included verification qualifications, at that point the 401 reaction shows that approval has been denied for those accreditations. The client specialist MAY rehash the request with another or supplanted Authorization header field2. On the off chance that the 401 reaction contains a similar test as the earlier reaction, and the client operator has just endeavored confirmation at any rate once, at that point the client specialist SHOULD show the encased representation to the client, since it normally contains pertinent symptomatic data. 

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