Default nullability
By default, Fields and argument in Pothos ar Nullable. This default can be changed be overwritten by
setting nullable: false in the options for output fields and by setting required: true for input
fields or arguments.
These defaults may not be the right choice for every application, and changing them on every field can be a pain. Instead, Pothos allows overwriting these defaults when setting up your SchemaBuilder. You will need to provide the new defaults in two places:
- 
In the type parameter for the builder, which enables the type checking to work with your new settings. 
- 
In the Builder options, so that the correct schema is built at run time.