Allow User to write in a sharepoint List but not Edit or Delete his created content

[Sriks]

Hello, I am working on a project where Users are sending informations using a Powerapp which is accessible from a sharepoint Group. The information is Patched inside a sharepoint List that the User has access to (creating and editing elements created by the User). 

I developped a solution, using a flow that moves new items in that List to another List where the User got no permission (the Flow is impersonating the administrator).

That way I am able as an Owner of my sharepoint site to access the item using another Powerapp. And here is my problem, I need the User being able to view, using a Powerapp the content sent to that List, and I need him not being able to see the content sent by other Users of the Site.

Does a way of making my List accessible only from Powerapps (while being a sharepoint list) exists ?

Is that possile to make the User connect to my app using another microsoft account (Like giving rights whith a flow) ?

Is it a viable solution for me to create my own API working as Plumsail SP API's that edit permissions of a SP List ?

Many thanks !!

Sriks 

[MatthieuMegaly_ · Accepted solution]

Hi

Does a way of making my List accessible only from Powerapps (while being a sharepoint list) exists ?

The only way i'm thinking of is getting items / updating items from the list with a flow running under service account permissions. So the user won't have direct access to the list as the list won't be seen as a data source of the app.

Is that possile to make the User connect to my app using another microsoft account (Like giving rights whith a flow) ?

I don't think so

Is it a viable solution for me to create my own API working as Plumsail SP API's that edit permissions of a SP List ?

Yes it is

Regards