Login to REST is failing

Document ID : KB000120007
Last Modified Date : 06/11/2018
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When attempting to login via REST API calls, the login is unsuccessful and is being rejected.  Need to know what may be causing the issue. 

jrest.log presents the following error:
11/01 15:58:11.501 [http-bio-8050-exec-1] ERROR SecurityInInterceptor 393 Basic Authorization failed (Login failed for userid (testuser1); no default role found for session type (10)) 
Service Desk Manager 14.1 and higher
The end user is attached to an access type whose "REST Web Service API Role" entry is deficient.
  • Verify the access type that is in place for the specified end user has a default role specified for the given access type on "REST Web Service API Role".  
  • Check that the given role under "REST Web Service API Role" has the following set on its Function Access (required to run any REST web services activities): 

    Administration : View 
    Reference : View 
    Security : View 
    Stored Query : View 
Additional Information:
See also:  KB000044903:  How to restrict access to some mobile user of CA Service Desk Manager?