[{
    userId: 'ab4e3870-287e-11e7-b5a1-abb6183e9866',
    email: 'email1@hotmail.com'
},{
    userId: 'ae149220-2883-11e7-bbf9-1fb134f2b4ad',
    email: 'email2@hotmail.com'
}]

{
    'ab4e3870-287e-11e7-b5a1-abb6183e9866': { name: 'john', roles: 'detective'},
    'ae149220-2883-11e7-bbf9-1fb134f2b4ad': { name: 'james', roles: 'plumber'},
}

[{
    userId: 'ab4e3870-287e-11e7-b5a1-abb6183e9866',
    email: 'email1@hotmail.com',
    name: 'john',
    roles: 'detective'
},{
    userId: 'ae149220-2883-11e7-bbf9-1fb134f2b4ad',
    email: 'email2@hotmail.com',
    name: 'james',
    roles: 'plumber'
}]