lib: don't use then/catch in command

[JacksonTian]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (f7636db) 53.30% compared to head (9234ce9) 54.30%.

Files	Patch %	Lines
commands/login.js	0.00%	2 Missing ⚠️
lib/command.js	0.00%	2 Missing ⚠️
commands/pack.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #57      +/-   ##
==========================================
+ Coverage   53.30%   54.30%   +1.00%     
==========================================
  Files          25       25              
  Lines        1696     1672      -24     
==========================================
+ Hits          904      908       +4     
+ Misses        792      764      -28     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.