feat: normalize email on user create and update (#38)

* feat: update to lower case

* test: add upper case email

* fix: query

* test: fix email

* test: lowercase email on update user

* test: test description

* fix: move to service layer

* test: add handler tests

* fix: change error

* fix: change error

* feat: add mock

* test: add user service tests

* test: remove unnecessary newline

* fix: golangci.yml

* fix: golangci.yml

* fix: golangci.yml

* lint: fix whitespace

* test: remove test

* test: add test

* test: fix dependencies

* test: fix dependencies

* test: fix expectency

* feat: expose AuditKeyUserUpdate

* feat: expose AuditKeyUserCreate

* fix: test

* test: add get by email

* test: add get by uuid

* test: add fetchcurrentuser test

Author: ishanarya0