SFTP Further Auth required

Add-Type -Path "C:\Program Files (x86)\WinSCP\WinSCPnet.dll"
 
# Setup session options
$sessionOptions = New-Object WinSCP.SessionOptions -Property @{
    Protocol = "sftp"
    SshHostKeyFingerprint = "ssh-rsa 2048 ######c1mPs7MODjkyCxawY+wIAn1m7UmV4NdPE="
    HostName = "ftp.site.co.uk"
    UserName = "username"
    Password = "pass"   
}
$session = New-Object WinSCP.Session
 
# Connect
$session.Open($sessionOptions)

Exception calling "Open" with "1" argument(s): "Connection has been unexpectedly closed. Server sent command exit status 0.
Authentication log (see session log for details):
Using username "excanf".
Further authentication required
Authentication failed."
At C:\secure-file-transfer-project\Powershell-Scripts\CR_Stockfile_Import.ps1:22 char:9
+         $session.Open($sessionOptions)
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : SessionRemoteException