Getting Azure advisor details from powershell using REST API

            
$advisorName = "Azure Advisor";            
function Invoke-AzureManagementPostMethod {            
             
 process {            
            
    $ClientId = "3fb00cf8-b7a6-42e0-bfdd-ae703499a52c"            
    $ClientSecret = "40v/urtrK+QLZzU5LalL75iNJ5wv9I4EUkygbM+6EtQ="            
                
    $TenantId = (Get-AzureRmContext).Tenant.Id            
    $Resource = "https://management.azure.com/"            
     $authData = Invoke-RestMethod -Method Post `
   -Uri "https://login.windows.net/$TenantId/oauth2/token?api-version=1.0" `
   -Body @{ "grant_type"="client_credentials"; "resource"=$Resource; "client_id"=$ClientId; "client_secret"=$ClientSecret; } `
   -ContentType "application/x-www-form-urlencoded"            
  $headers = @{"Authorization"="Bearer $($authData.access_token)"}            
  return $headers            
 }            
}            
            
function Get-AzureAdvisorRecommendations {            
param(            
    [Parameter(Mandatory=$true)][String]$SubscriptionId            
)            
            
    $method = "GET"            
    $URI = "https://management.azure.com/subscriptions/$SubscriptionId/providers/Microsoft.Advisor/recommendations?api-version=2017-03-31"            
    $managementHeaders = Invoke-AzureManagementPostMethod            
    $allRecommendations = Invoke-RestMethod -Uri $URI -Method $method -Headers $managementHeaders             
    $resourcegroupRecommendations=@{}             
            
    foreach($recommendation in $allRecommendations.Value | where { $_.properties.category -in ("HighAvailability", "Performance", "Cost")} )            
    {            
        $values = $recommendation.id.Split('/')            
        $resourceGroup = $values[4]            
        $resourceName = $values[8]            
        $recommendation = @{            
            Resource          =  $resourceName            
            Source            =  $advisorName                    
            Policy            =  $recommendation.properties.shortDescription.problem                     
            Severity          =  $recommendation.properties.impact                    
            Recommendation    =  $recommendation.properties.shortDescription.solution            
            Message           =  ""            
        }             
        $recommendationObject = New-Object PSObject -Property $recommendation            
        if($resourcegroupRecommendations.ContainsKey($resourceGroup))            
        {            
            $recommendationpreviousObject = $resourcegroupRecommendations.Get_Item($resourceGroup)            
            $resourcegroupRecommendations["$resourceGroup"] = $recommendationpreviousObject,$recommendationObject            
        }            
        else            
        {            
            $resourcegroupRecommendations.Add($resourceGroup, $recommendationObject)            
        }             
    }             
    $resourcegroupRecommendations            
                
}            
            
            
$output = Get-AzureAdvisorRecommendations (Get-AzureRmContext).Subscription.Id