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Voucher
Array
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    [amount] => 1.99
    [transferid] => 25252
    [description] => vingd-api-php-demo
    [message] => Thank you, Vingd API PHP demo user!
    [until] => 2018-01-11 04:37:14+01
    [code] => 3DSUNEXDVP
    [gid] => 
    [urls] => Array
        (
            [redirect] => https://www.sandbox.vingd.com/vouchers/3DSUNEXDVP
            [popup] => https://www.sandbox.vingd.com/popup/vouchers/3DSUNEXDVP
        )

    [action] => add
)

You can now go to Vingd [user frontend] and use this voucher, or you may use the voucher automagically, via popup.