Creates the phone's own Opensolr Index, photos_<ANDROID_ID>__dense, in the region vector_regions pointed to. It runs only when the index is certainly missing.
POST https://opensolr.com/solr_manager/api/create_indexcore_name and region in the address; a form with email, api_key, core_name, and the phone it is for: device_name (such as Samsung SM-S918B) and device_id.
The phone it is for is kept with the index, and that is what the re-use question shows on a new phone. See phones you no longer use.
ERROR_CANNOT_ADD_MORE_THAN_…Your Opensolr plan cannot hold another index. Remove an index you no longer use.
ERROR_CORE_NAME_TAKEN_CHOOSE_ANOTHER_CORE_NAMEAn index named photos_…__dense already exists in another Opensolr account.
After a create, the app reads the index address with get_core_info, uploads the configuration with upload_zip_config_files, and waits until the index answers with it.