* now users require a profile.
* new column on profile: newsletter.
* using config.enums for newsletter status.
* now you can define 0 pre-defined tokens for a study.
* css optimization.

* New layout and optimization based on tailwindcss.
* Reset password Function.
* New Public Url interface.

* now css is using tailwindcss
* minor optimization
* new layout

* optimization of the layout
* using admin instead of "superadmin"

* enabled registration
* added email_verified_at to user table
* bugfixed look of notifications tab
* now users need to verify their email when they register

* merged master branch to Production

* now you can create/delete tokens right into the interview
* new api interface with web auth
* laravel 6.0.1