multiple records in Lookup field

[freifer]

HI All.

I am new to Appgini and not to technical with DBs.
I am building an app for Door keys register, I want to be able to have many keys assigned to the same person.
I have a table called users with a filed called keys called by a lookup from a table called keys, but this will only allow me to have one value for the filed key.

I hope I am making sense here...

Attached is a copy of the appgini app

Any help is appreciated.

Wally