Key Property
The secret key.
Syntax
public var key: String {
get {...}
set {...} }
public var keyB: Data {
get {...}
set {...} }
Default Value
""
Remarks
This property holds the secret key used when calling CalculateResponse and VerifyResponse.
This property is also used when calling CreateChallenge when ChallengeType is set to Signature.
An empty key is valid, however it is recommended to provide a key value.