I am using SharePoint 2013. I login on the production environment with the farm account. I go to central admin and go to the search service application. I go to the results source. I click on the default result source "Local SharePoint Results". I cannot edit this result source because everything is readonly. I see also a warning:
You don't appear to have permission to view the account credentials for this result source. You need permissions at the level at which the result source was created. For example, only an account with administrator permissions for a Search Service application can view the account credentials for a result source created at that level.
How can I edit this default result source? Or how can I see which account has permissions to edit this result source?