TEST WITH EXISTING ATTRIBUTES
[28-Nov-2018 19:12:06 UTC] sending attributes to URL: https://app.userengage.com/api/public/users/139707367/set_multiple_attributes/
[28-Nov-2018 19:12:06 UTC] Array
(
    [escudos] => 1
    [street_address_1] => Addr1
)

[28-Nov-2018 19:12:07 UTC] response:
[28-Nov-2018 19:12:07 UTC] stdClass Object
(
    [errors] => stdClass Object
        (
            [street_address_1] => Provided `name` conflicted with existing attribute. Please choose a different name.
            [escudos] => Provided `name` conflicted with existing attribute. Please choose a different name.
        )

)

TEST WITH ATTRIBUTES THAT DONT EXIST

[28-Nov-2018 19:13:38 UTC] sending attributes to URL: https://app.userengage.com/api/public/users/139707367/set_multiple_attributes/
[28-Nov-2018 19:13:38 UTC] Array
(
    [newattribute] => newvalue
    [newattribute2] => newvalue2
)

[28-Nov-2018 19:13:39 UTC] response:
[28-Nov-2018 19:13:39 UTC]