put shared folder name as group in the account

[fushall]

Though I have not an account with shared folder.

[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.30%. Comparing base (41af73a) to head (b204292).

Files with missing lines	Patch %	Lines
lastpass/vault.py	33.33%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #43      +/-   ##
==========================================
- Coverage   72.72%   72.30%   -0.42%     
==========================================
  Files          10       10              
  Lines         385      390       +5     
==========================================
+ Hits          280      282       +2     
- Misses        105      108       +3     

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