nga.field('accounts', 'referenced_list') // display list of related accounts
    .targetEntity(accounts) 
    .targetReferenceField('voip_id')
    .targetFields([
        nga.field('id').isDetailLink(true),
        nga.field('date_created'),
        nga.field('user_profile_id'), // <-- this works fine
        nga.field('user_profile_id', 'reference') // <-- it doesn't call the api request for the profile entity
            .label('User Profile')
            .validation({required: true})
            .targetEntity(profiles)
            .targetField(nga.field('username')),
    ])