feat: add projection full for users

[longnbao]

By setting the projection to "full," you're essentially specifying that you want to retrieve all available information related to the user, including customSchema, which refers to any custom attributes or fields that have been defined within the Google Workspace user profiles.

This change will ensure that you can access and utilize a more extensive range of user data, providing a more detailed and comprehensive view of user information within the Google Workspace.

// Possible values:
//
//	"basic" (default) - Do not include any custom fields for the user.
//	"custom" - Include custom fields from schemas requested in
//
// `customFieldMask`.
//
//	"full" - Include all fields associated with this user.