* Support multiple config entries at once
* Add test coverage for multiple config entries
* Add support for multiple config entries to google config flow
* Clear hass.data when unloading config entry
* Make google config flow defensive against reuse of the same account
* Assign existing google config entries a unique id
* Migrate entities to new unique id format
* Support muliple accounts per oauth client id
* Fix mypy typing errors
* Hard fail to keep state consistent, removing graceful degredation
* Remove invalid entity regsitry entries
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