* Remove unused exports and decaffeinate comment
* Update export format
* Make `launchpadPage` async
* Make `_atLeastOneAdminExists` async
* Make `sendTestEmail` async
* Make `registerExternalAuthAdmin` async
* Make `registerAdmin` async
* Update tests LaunchpadControllerTests.js
* Use `expressify(...)`
* Fix unit tests: export `LaunchpadController`
* Fix unit tests by awaiting expressified functions (could include breaking changes!)
* Call `.exec()` after `User.updateOne(...)`
* Revert promisification of `expressify`
* Revert some `return` removal in tests
GitOrigin-RevId: c73a38bf1cf798830df046fe96d3516178655ea6