fix empty security token issue

[JacksonTian]

You need to complete

• unit tests and/or feature tests
• documentation is changed or added

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.93%. Comparing base (24f869e) to head (cede196).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #115      +/-   ##
==========================================
+ Coverage   98.59%   98.93%   +0.33%     
==========================================
  Files          30       30              
  Lines        2064     2064              
==========================================
+ Hits         2035     2042       +7     
+ Misses         17       12       -5     
+ Partials       12       10       -2     

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