We have several clients using our software linked to their Laserfiche repositories.
They, until now, all used forms accounts to log in, successfully, with the below code.

var repository = new RepositoryRegistration(endpoint, cred.RepositoryName);
repository.SecurePort = port;
            
this.Session = new Session();
this.Session.LogIn(cred.UserName, cred.Password, repository);

We now have a client that uses windows as the default authentication provider for Laserfiche, but they have provided a forms account for us to use. I cannot see how to tell Laserfiche that these credentials are not windows but forms instead.
 

Using the web interface, https://server/laserfiche, only accepts windows accounts, but if I visit https://server/laserfiche/Login.aspx I can login using my forms account.

Is there an equivalent in code way to say these are forms credentials?