Wow this took me the entire day: If you run `createServer` multiple
times, more and more middlewares get added to the schema. That's why
the test would create 2^n notifications for n times you called
`createServer`. This is related to the following bug:
https://github.com/prisma/graphql-middleware/issues/63
FYI: @Tirokk I think we'll never remove or add new badges through
graphql. Instead, we will seed them manually with direct access to the
database. Therefore I removed the respective mutations and also your
tests regarding permissions.
