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[ {}, { "username": "foo", "password": "bar", "numbers": [ 1, 2 ] }, { "username": "foo", "password": "bar", "numbers": [ 3, 4 ] }, { "username": "foo", "password": "bar", "numbers": [ 5, 6 ] }, { "username": "foo", "password": "bar", "numbers": "invalid" }, {}]