$status->challenge()
Returns the type of the active challenge
$status->challenge(bool $automaticFallback = true): string|nullParameters
| Name | Type | Default | Description | 
|---|---|---|---|
| $automaticFallback | bool | true | If set to false, no faked challenge is returned;WARNING: never send the resulting nullvalue to theuser to avoid leaking whether the pending user exists | 
Return type
string|null