It looks like you are trying to use your knowledge of relational databases with non-SQL databases such as Elasticsearch (ES). There are several options.
№1. , . , . ( ), ES. , ES , , / ES.
№2. types id/ id/keys, index. :
a) id;
b) , email ( id a), , Kibana id
c) , keys ( , id email, , , )
№ 3. , , indices types. (, docs-email docs-keys),
№ 4. , . ES API REST . , , ( , ES ).