Who is doing what? Script authorizations

As presented in Google's documentation, on one side, we have the user at the keyboard and on the other side, the script's author who installed the trigger; that is one aspect of the question and the other is the type of trigger: simple or installable.

Simple triggers run as the user at the keyboard, whether they are anonymous or logged in as an authorized editor, and therefore, simple triggers can only perform actions that don't require specific authorization or to connect to any service that needs authentication.

Following the same logic and knowing that triggers respond to events without informing the user, that is, silently, any installable trigger created by the script author will always run as if the ...

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