This automation does not require an input. The account you select will be used to extract the profile viewers.
You can choose to maximize the number of persons who viewed your profile to extract, by setting a max_result value. By default it is set to 50 - you can put 1000 maximum.
If you want/need to extract more people, you should segment your extract into smaller batches.
To use this setting with the API, you can pass max_results to the input_parameters field.