Update Resource Graph request to POST and set default content type

Changed the Resource Graph API call in Invoke-ListApiTest.ps1 from a GET to a POST request with a JSON body and updated the API version. Set the default ContentType to 'application/json' in New-CIPPAzRestRequest.ps1 to ensure correct request formatting.

Author: JohnDuprey

Modules/CIPPCore/Public/Entrypoints/HTTP Functions/CIPP/Core/Invoke-ListApiTest.ps1

@@ -33,7 +33,8 @@ function Invoke-ListApiTest {
 
         # test New-CIPPAzRestRequest KQL for resource graph
         $Query = 'Resources | project name, type'
-        $Request = New-CIPPAzRestRequest -Method GET -Resource 'https://management.azure.com/' -ApiVersion '2021-03-01' -Endpoint 'providers/Microsoft.ResourceGraph/resources' -QueryParameters @{ 'query' = $Query }
+        $Json = ConvertTo-Json -Depth 10 -Compress -InputObject @{ query = $Query }
+        $Request = New-CIPPAzRestRequest -Method POST -Resource 'https://management.azure.com/' -Endpoint 'providers/Microsoft.ResourceGraph/resources?api-version=2022-10-01' -Body $Json
     }
     $Response.AllowedTenants = $script:CippAllowedTenantsStorage.Value
     $Response.AllowedGroups = $script:CippAllowedGroupsStorage.Value

Modules/CIPPCore/Public/GraphHelper/New-CIPPAzRestRequest.ps1

@@ -70,7 +70,7 @@ function New-CIPPAzRestRequest {
         [hashtable]$Headers = @{},
 
         [Parameter(Mandatory = $false)]
-        [string]$ContentType,
+        [string]$ContentType = 'application/json',
 
         [Parameter(Mandatory = $false)]
         [switch]$SkipHttpErrorCheck,
@@ -137,10 +137,10 @@ function New-CIPPAzRestRequest {
 
     # Build Invoke-RestMethod parameters
     $RestMethodParams = @{
-        Uri                = $Uri
-        Method             = $Method
-        Headers            = $RequestHeaders
-        ErrorAction        = $ErrorActionPreference
+        Uri         = $Uri
+        Method      = $Method
+        Headers     = $RequestHeaders
+        ErrorAction = $ErrorActionPreference
     }
 
     if ($Body) {