Section 3.88.3. APIVersion
Section 3.88.4. ClientID
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Section 3.88.5. APIKey
3.88.4. ClientID
ClientID is required for signed requests and responses. Yubico allocates this for YubiCloud users and seems to always require it when using YubiCloud validation servers.
There is no default value.
# Value allocated to us by Yubico ClientID 1