What HTTP status code 401 indicates bad request?

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Tags

1. #valid
2. #request
3. #status
4. #password
5. #authorization
6. #usually
7. #credentials
8. #those
9. #indicates
10. #response
11. #included
12. #because
13. #target
14. #lacks
15. #resource
16. #username
17. #authentication
18. #applied
19. #refused