What does it mean if AuthenticationMethod has AllowedAuthentications set as null?

I have a server where I am sending password, and keyboard-interactive authentication methods. The password fails so it uses keyboard interactive.

Right after I connect I am getting the sshclient.ConnectionInfo so I can log some data.

// ConnectionInfo looks like this in ssh.net but I am interested in Authentication Methods

class ConnectionInfo {
....
public IList<AuthenticationMethod> AuthenticationMethods { get; }
...
}

This is the code that does the printing:

                // Log information about the connection authentication methods
                foreach (var eachAthenticationMethod in connectionInfo?.AuthenticationMethods ?? new List<AuthenticationMethod>())
                {
                    Log($" Strategy: {eachAthenticationMethod?.Name},  AllowedAuthentication:  {string.Join(",", eachAthenticationMethod?.AllowedAuthentications ?? (new List<string>()).ToArray())}");
                }

This is what I am printing.

Strategy: password, AllowedAuthentication: publickey,password,keyboard-interactive
Strategy: keyboard-interactive, AllowedAuthentication:

keyboard-interactive's AllowedAuthentication is null.

What does it mean if AuthenticationMethod has AllowedAuthentications set as null?

Start from ConnectionInfo.AuthenticationMethods and AuthenticationMethod.AllowedAuthentications, which are the members shown in the issue, and inspect how the SSH.NET authentication strategies populate them. Confirm what a null value means for keyboard-interactive authentication and document that behavior for users.