Make clear description of anonymous user

[JeromeDeLeon]

I don't know if it's intended but it's not clear IMO.

[codecov]

Codecov Report

Merging #6655 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #6655      +/-   ##
==========================================
- Coverage   93.92%   93.89%   -0.03%     
==========================================
  Files         169      169              
  Lines       11997    12053      +56     
==========================================
+ Hits        11268    11317      +49     
- Misses        729      736       +7     

Impacted Files	Coverage Δ
src/Options/Definitions.js	100.00% <ø> (ø)
src/Options/index.js	100.00% <ø> (ø)
src/Adapters/Cache/RedisCacheAdapter/index.js	94.64% <0.00%> (-3.32%)	⬇️
src/ParseServer.js	89.47% <0.00%> (-1.60%)	⬇️
src/Adapters/Storage/Mongo/MongoStorageAdapter.js	92.85% <0.00%> (-0.67%)	⬇️
src/rest.js	98.86% <0.00%> (ø)
src/triggers.js	93.18% <0.00%> (ø)
src/Controllers/index.js	96.66% <0.00%> (ø)
src/Routers/UsersRouter.js	94.33% <0.00%> (ø)
... and 21 more

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[dplewis]

Can you generate the definitions?

https://github.com/parse-community/parse-server/blob/master/CONTRIBUTING.md#generate-parse-server-config-definition

[dplewis]

I generated the definitions. Nice catch!