Riskv1authenticationsetupsClientReferenceInformation constructor should not have a default implementation of default(string)

[wrightsonm]

Constructor is:

public Riskv1authenticationsetupsClientReferenceInformation(string Code = default(string))

The constructor then throws an exception if the argument is null.
This can be caught at compile time by removing = default(string)

[xantari]

This sounds related to my request here: #43