I can not use custom scalar when serve with faked data

[1s22s1]

Is it intented behavior?

Steps to reproduce

scalar DateTime

type Query {
  book: Book!
}

type Book {
  title: String!
  created_at: DateTime!
  updated_at: DateTime!
}

1. Run graphql-inspector serve schema.graphqls
2. Execute below GraphQL query.

query {
  book {
    created_at
  }
}

3. Get Unexpected error.

System configuration

• @graphql-inspector/[email protected]
• Yarn 1.22.19
• Node.js v18.17.1

[1s22s1]

This is no longer comment. I will close this.

Thank you.