I'm trying to combine JSON using similar values. Below is example JSON from my project. It's stored in a database all in one file:

[   {
    email: 'test@test.com',
    client: 'Test Account',
    UserID: '123456',
    activelistings: [ '1.1.1.1' ]   },   
{
    email: 'test@test.com',
    client: 'Test Account',
    UserID: '123456',
    activelistings: [ '2.2.2.2']   } ]

What I'm trying to do is combine based on email, client, and UserID. Below is what I'm aiming for:

   [{
        email: 'test@test.com',
        client: 'Test Account',
        UserID: '123456',
        activelistings: [ '1.1.1.1', '2.2.2.2']   } ]