POST: Array
(
    [key] => EXAM-1234-TEST
    [name] => DemoUser
)
KEYS: ["EXAM-1234-TEST"]
SUCHT: EXAM-1234-TEST
POST: Array
(
)
POST: Array
(
    [key] => EXAM-1234-TEST
    [name] => DemoUser
)
KEYS: ["EXAM-1234-TEST"]
SUCHT: EXAM-1234-TEST
POST: Array
(
    [key] => 9215-C1CB-3D27
    [name] => Test123
)
KEYS: ["EXAM-1234-TEST","9215-C1CB-3D27"]
SUCHT: 9215-C1CB-3D27
POST: Array
(
    [key] => 9215-C1CB-3D27
    [name] => Test123
)
KEYS: ["EXAM-1234-TEST","9215-C1CB-3D27"]
SUCHT: 9215-C1CB-3D27
POST: Array
(
    [key] => 9215-C1CB-3D27
    [name] => Test123
)
KEYS: ["EXAM-1234-TEST","9215-C1CB-3D27"]
SUCHT: 9215-C1CB-3D27
POST: Array
(
)