Update samy.ps1

samy.ps1

@@ -2046,22 +2046,30 @@ function Install-DattoRMM {
 
     # 1) Optionally fetch credentials from webhook
     if ($UseWebhook) {
-        if (-not $WebhookPassword) {
-            Write-LogHybrid "Webhook password missing." Error DattoRMM -LogToEvent; return
-        }
+
+        # Allow blank for IP allowlist scenario. Only treat true $null as missing.
+        if ($null -eq $WebhookPassword) { $WebhookPassword = '' }
+            Write-LogHybrid "Webhook password not provided (null). Treating as blank for allowlisted IP flow." Warning DattoRMM -LogToEvent
+
         try {
             $resp = Invoke-RestMethod -Uri $WebhookUrl `
-                                      -Headers @{ SAMYPW = $WebhookPassword } `
-                                      -Method GET
+                                    -Headers @{ SAMYPW = [string]$WebhookPassword } `
+                                    -Method GET `
+                                    -ErrorAction Stop
+
             $ApiUrl       = $resp.ApiUrl
             $ApiKey       = $resp.ApiKey
             $ApiSecretKey = $resp.ApiSecretKey
+
             Write-LogHybrid "Webhook credentials fetched." Success DattoRMM -LogToEvent
-        } catch {
-            Write-LogHybrid "Failed to fetch webhook credentials: $($_.Exception.Message)" Error DattoRMM -LogToEvent; return
+        }
+        catch {
+            Write-LogHybrid "Failed to fetch webhook credentials: $($_.Exception.Message)" Error DattoRMM -LogToEvent
+            return
         }
     }
 
+
     # 2) Validate API parameters
     if (-not $ApiUrl -or -not $ApiKey -or -not $ApiSecretKey) {
         Write-LogHybrid "Missing required API parameters." Error DattoRMM -LogToEvent; return