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The domain classes described here are pretty similar to what was laid out already in the vocabulary section.
External User
When a user interacts with mod-service-interaction, by fetching their dashboard or otherwise, the first thing the module will do is resolve their FOLIO user UUID to a domain class called ExternalUser. This means that every user who interacts with the backend will have an ExternalUser domain object which we then can hang dashboards from. This domain class stores no personal information besides the user UUID and the dashboard configuration.
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