v.5.2.1#
Changes
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API service: - 
Time fields validation was fixed for all the resources utilizing create_time__gteandcreate_time__ltfilters. An error occurred when time was set in UTC format (the "Z" suffix was used in the field). Example: "2018-08-11T09:11:41.674Z".
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Fixed was validation for "match_policy" with events set as candidates. The wrong error message "unexpected value; permitted: 'faces'" was returned when filters for events were set incorrectly. 
 
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Admin service: - 
The internal error with status code 500 was fixed for requests without any authorization data. 
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The error "BadAdminAuth" is now returned in the case of authorization with an incorrect login/password pair. 
 
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