Set-PSUAuthenticationMethod -Type "Form" -ScriptBlock {
param(
        [PSCredential]$Credential
    )
    
    Add-Type -AssemblyName System.DirectoryServices.AccountManagement
        
    # is this a UPN?
    if ( $Credential.UserName.IndexOf('@') -gt -1 ) {
    
        # juggle back and forth from SID to get NTAccount format
        $NTAccountName = ([System.Security.Principal.NTAccount]$Credential.UserName).Translate([System.Security.Principal.SecurityIdentifier]).Translate([System.Security.Principal.NTAccount]).Value
    
    } elseif ( $Credential.UserName.IndexOf('\') -gt -1 ) {
    
        # already NTAccount format
        $NTAccountName = $Credential.UserName
    
    } else {
    
        # someone didn't enter their domain...
        $NTAccountName = "NDGOV\" + $Credential.GetNetworkCredential().UserName
    
    }
    
    # split domain and username
    $DomainName, $UserName = $NTAccountName.Split('\',2)
        
    # perform auth with AD
    $PrincipalContext = New-Object System.DirectoryServices.AccountManagement.PrincipalContext( 'Domain', $DomainName )
    $Authenticated = $PrincipalContext.ValidateCredentials( $UserName, $Credential.GetNetworkCredential().Password, 'Negotiate, Sealing' )
        
    if ( $Authenticated ) {
    
        # discover the user principal, needed for the user DN
        $UserPrincipal = [System.DirectoryServices.AccountManagement.UserPrincipal]::FindByIdentity($PrincipalContext, [System.DirectoryServices.AccountManagement.IdentityType]::SamAccountName, $NTAccountName )
    
        # get the user's domain
        #$UserDomainContext = [System.DirectoryServices.ActiveDirectory.DirectoryContext]::new( 'Domain', $DomainName, $Credential.UserName, $Credential.GetNetworkCredential().Password )
        #$UserDomain = [System.DirectoryServices.ActiveDirectory.Domain]::GetDomain( $UserDomainContext )
    
        # get the computer's domain
        #$ComputerDomain = [System.DirectoryServices.ActiveDirectory.Domain]::GetComputerDomain()
    
        # hold all the user groups
        [System.Collections.Generic.List[hashtable]]$Groups = @()
    
        # get groups from user's domain
        [adsisearcher]::new( $UserDomain.GetDirectoryEntry(), "(&(objectCategory=group)(objectClass=group)(member:1.2.840.113556.1.4.1941:=$($UserPrincipal.DistinguishedName)))", @('name') ).FindAll().ForEach({
    
            $Groups.Add(@{
                Type = 'Group'
                Value = $_.Properties['name'][0]
                Issuer = $UserDomain.Name
            })
        
        })
    <#
        # get groups from the computer's domain (if different)
        if ( $UserDomain.Name -ne $ComputerDomain.Name ) {
    
            # lookup the user's foreign security principal in the computer's domain
            $ForeignSecurityPrincipal = [adsisearcher]::new( $ComputerDomain.GetDirectoryEntry(), "(&(objectCategory=foreignSecurityPrincipal)(objectClass=foreignSecurityPrincipal)(name=$($UserPrincipal.Sid)))", @('distinguishedName') ).FindOne().Properties['distinguishedName'][0]
        
            # find all the group memberships
            [adsisearcher]::new( $ComputerDomain.GetDirectoryEntry(), "(&(objectCategory=group)(objectClass=group)(member:1.2.840.113556.1.4.1941:=$ForeignSecurityPrincipal))", @('name') ).FindAll().ForEach({
        
                $Groups.Add(@{
                    Type = 'Group'
                    Value = $_.Properties['name'][0]
                    Issuer = $ComputerDomain.Name
                })
        
            })
        
        }
            #>
        New-PSUAuthenticationResult -Success -UserName $UserPrincipal.UserPrincipalName -Claims {
            $Groups | ForEach-Object { New-PSUAuthorizationClaim @_ }
        }
        
    } else {
    
        New-PSUAuthenticationResult -ErrorMessage 'Bad username or password :)'
    
    }
}