If the secret key requires a password for usage, please assign it to this field. <p>
You can only omit this when using JWT algorithms "HS256", "HS384" or "HS512" (it's ignored in that case actually). <p>
Every other algorithm requires you to at least set this to <code>NULL</code> if the {@link #secret_key} isn't password-protected.
If the secret key requires a password for usage, please assign it to this field. <p> You can only omit this when using JWT algorithms "HS256", "HS384" or "HS512" (it's ignored in that case actually). <p> Every other algorithm requires you to at least set this to <code>NULL</code> if the {@link #secret_key} isn't password-protected.