Generic input type broken from 0.69.0 onward

[daironmichel]

Generic input types were working correctly until version 0.68.4 but after 0.69.0 it's throwing a type error.
here's a test for it

def test_generic_input():
    E = TypeVar('E')

    @strawberry.input
    class EnumInput(Generic[E]):
        value: E

    @strawberry.enum
    class Make(Enum):
        FORD = 'ford'
        TOYOTA = 'toyota'
        HONDA = 'honda'

    @strawberry.type
    class Car:
        make: Make

    @strawberry.type
    class Query:
        @strawberry.field
        def cars(self, make: Optional[EnumInput[Make]] = None) -> List[Car]:
            return []

    schema = strawberry.Schema(query=Query)
    query = '''
        query CarsList {
            cars(make: {value: FORD}) {
                __typename
            }
        }
        '''
    result = schema.execute_sync(query)
    assert result.errors is None

output error

self = <GraphQLObjectType 'Query'>

    @cached_property
    def fields(self) -> GraphQLFieldMap:
        """Get provided fields, wrapping them as GraphQLFields if needed."""
        try:
            fields = resolve_thunk(self._fields)
        except Exception as error:
>           raise TypeError(f"{self.name} fields cannot be resolved. {error}")
E           TypeError: Query fields cannot be resolved. 'EnumDefinition' object has no attribute '__name__'

.venv/lib/python3.9/site-packages/graphql/type/definition.py:769: TypeError