[@accounts/server] Deactivate user

[pradel]

Close #48

• Logic
• Tests

[codecov]

Codecov Report

Merging #480 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #480      +/-   ##
==========================================
+ Coverage    95.8%   95.83%   +0.03%     
==========================================
  Files          57       57              
  Lines        1263     1274      +11     
  Branches      175      166       -9     
==========================================
+ Hits         1210     1221      +11     
  Misses         50       50              
  Partials        3        3

Impacted Files	Coverage Δ
packages/server/src/accounts-server.ts	90.21% <100%> (+0.32%)	⬆️
packages/database-manager/src/database-manager.ts	100% <100%> (ø)	⬆️
packages/database-mongo/src/mongo.ts	100% <100%> (ø)	⬆️

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