Root Value example doesn't work

[zegelin]

The Root Value example in the documentation:

from graphene import ObjectType, Field, Schema

class Query(ObjectType):
    me = Field(User)

    def resolve_user(root, info):
        return {'id': root.id, 'firstName': root.name}

schema = Schema(Query)
user_root = User(id=12, name='bob')
result = schema.execute(
    '''
    query getUser {
        user {
            id
            firstName
            lastName
        }
    }
    ''',
    root=user_root
)
assert result.data['user']['id'] == user_root.id

doesn't work. Throws NameError: name 'User' is not defined.

What's not clear is:

• Where User is defined -- is it defined somewhere else in the documentation? (hyperlink/inline)
• The Query field is named me yet the resolver function is named resolve_user.
• The executed query asks for user (not me).
• The created User object (assigned to user_root) is constructed to have a name field, yet the query asks for the firstName and lastName fields. Sure, resolve_user returns a dict with id, and firstName, but this adds to the confusion.

Having various combinations of name, firstName and lastName is confusing, especially in an example that doesn't work.