Add Samples for getting authentication methods using batch operations

samples/batch/Invoke-BatchWithRetry.ps1

@@ -0,0 +1,82 @@
+function Invoke-BatchWithRetry {
+    param(
+        [array]$BatchRequests,
+        [int]$MaxRetries = 3
+    )
+    $batchUri = "https://graph.microsoft.com/v1.0/`$batch"
+    $responses = @{}
+    $pending = @($BatchRequests) # Ensure it's an array
+    $retryCount = 0
+
+    while ($pending.Count -gt 0 -and $retryCount -le $MaxRetries) {
+        $batchBody = @{
+            requests = $pending
+        } | ConvertTo-Json -Depth 5
+
+        $result = Invoke-MgGraphRequest -Method POST -Uri $batchUri -Body $batchBody -ContentType "application/json"
+        foreach ($resp in $result.responses) {
+            "Id : $($resp.id), Status : $($resp.status)" | Out-File -FilePath "Path\To\log.txt" -Append
+            if ($resp.status -eq 429) {
+                # Do nothing - will retry later
+            } else {
+                $responses[$resp.id] = $resp
+                # Remove from pending
+                $pending = $pending | Where-Object { $_.id -ne $resp.id }
+            }
+        }
+
+        if ($pending.Count -gt 0) {
+            Start-Sleep -Seconds 5
+            $retryCount++
+        }
+    }
+    return $responses
+}
+
+# Get Users
+
+if (-not (Get-Command Connect-Entra -ErrorAction SilentlyContinue)) {
+    Write-Error "Connect-Entra not found. Install Microsoft.Entra and run Connect-Entra."
+    return
+}
+
+if (-not (Get-EntraContext)) {
+    $errorMessage = "Not connected to Microsoft Entra. Use 'Connect-Entra -Scopes User.Read.All' to authenticate."
+    Write-Error -Message $errorMessage -ErrorAction Stop
+    return
+}
+
+$users = Get-EntraUser -All
+
+# Prepare batch requests (20 per batch)
+$batchSize = 20
+$allResults = @{}
+for ($i = 0; $i -lt $users.Count; $i += $batchSize) {
+    $batch = @()
+    $batchUsers = $users[$i..([Math]::Min($i+$batchSize-1, $users.Count-1))]
+    foreach ($user in $batchUsers) {
+        $batch += @{
+            id     = $user.id
+            method = "GET"
+            url    = "/users/$($user.id)/authentication/methods"
+        }
+    }
+    $responses = Invoke-BatchWithRetry -BatchRequests $batch -debug
+    foreach ($id in $responses.Keys) {
+        $allResults[$id] = $responses[$id]
+    }
+
+    $activity = "Processed Users - $i of $($users.count) - $([System.Math]::Round($i / $($users.count) * 100))%"
+
+	Write-Progress -Activity $activity -Status "Fetching authentication methods" -PercentComplete (($i / $users.count) * 100)
+}
+
+Write-Output "Completed fetching authentication methods for $($users.count) users. Returned results for $($allResults.Count) users."
+
+# How to execute this script:
+
+# . .\samples\batch\Invoke-BatchWithRetry.ps1
+
+# To execute the script and measure performance, you can use the following command:
+
+# Measure-Command { . .\samples\batch\Invoke-BatchWithRetry.ps1 }