Application works with GraphQL.
There are 3 mongoose schemas that represent the core of our application
User, Relestate and Bookings

User can be owner of many real-estates.
Also, user can book real estates. Booking entity stores information about this.
Application should handle the queries for receiving
- all users ()
- all real-estates
- all bookings
examples of queries:
Take the namings from provided examples.
Also, note that drilling through related properties should be possible at any depth.
Set connection string to your database in config.env. < PASSWORD > is substituted in server.js


