Refactor synchronous queries for speeed!!

[aroquev00]

See how to optimize time since right now I'm doing a lot of sequential queries that could be avoided with having things in memory like query params, etc.

[aroquev00]

For example: https://github.com/googleinterns/step191-2020/compare/verifyUserFirestore2...countStudents?expand=1#diff-74b0bd66ee80f5461ba147739861175b