https://velog.io/@koominji/Android-Room%EC%97%90-List-%EB%84%A3%EA%B8%B0-TypeConverter-Cannot-figure-out-how-to-save-this-field-into-database.-You-can-consider-adding-a-type-converter-for-it
https://developer.android.com/training/data-storage/room/referencing-data
https://leveloper.tistory.com/215
https://wikidocs.net/21608
