Simplify query for existing email
Simplify query for existing email

It should be easier to read and more efficient now.

oeoeaio/openfoodnetwork,Matt-Yorkley/openfoodnetwork,mkllnk/openfoodnetwork,oeoeaio/openfoodnetwork,Matt-Yorkley/openfoodnetwork,mkllnk/openfoodnetwork,openfoodfoundation/openfoodnetwork,lin-d-hop/openfoodnetwork,oeoeaio/openfoodnetwork,lin-d-hop/openfoodnetwork,lin-d-hop/openfoodnetwork,openfoodfoundation/openfoodnetwork,Matt-Yorkley/openfoodnetwork,Matt-Yorkley/openfoodnetwork,openfoodfoundation/openfoodnetwork,mkllnk/openfoodnetwork,mkllnk/openfoodnetwork,lin-d-hop/openfoodnetwork,oeoeaio/openfoodnetwork,openfoodfoundation/openfoodnetwork