I have a power app that is a user entry form for a SP list where one of the columns is a people-picker

How do I constrain the list of "person" to just a few people instead of my whole org? Selection of groups is not the solution, I DO NOT need or want a group selected here: just a small list (20) of people. Neither is constraining the column settings to "Choose from Sharepoint Group" as a) there is no sharepoint group with these 20 people in it and b)creating a new SP team/site and adding these 20 people to achieve this purpose will result in c)them immediately leaving the group and possibly d)poisoning my lunch due to being added to yet another useless team/list that shows up in their seach.