The moving parts when programs access Google drive APIs
Programs present JSON credentials to Google APIs as part of Drive requests, in the form of JSON, for an identity that has access to the document. The credentials represent identities that exist within a project that has a role that lets it communicate with the API. The identity also has permission to read or write documents, often by associating the identity's email address with those documents. We use non-person Service Accounts to isolate the programmatic requests from any one-person,
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