I have this form

const form = useForm({
  context: { existingNames },
  mode: 'onChange',
  reValidateMode: 'onChange',
  resolver: yupResolver(validationRules),
  delayError: 600,
});

And want to use the existingNames context, an array of names, inside the oneOf rule.

const validationRules = Yup.object({
  name: Yup.oneOf(existingNames, , 'Name already in use.'), // 👈 ?
})

How?