Invoke-MgGraphBatchRequest [-Requests] <System.Collections.Generic.List`1[System.Collections.Hashtable]>
 [[-GraphVersion] <String>] [[-MaxRetries] <Int32>] [[-Activity] <String>] [-ProgressAction <ActionPreference>]
 [<CommonParameters>]

[System.Collections.Generic.List[hashtable]]$requests = @()
foreach ($user in $mgUsers) {
    $requests.Add(@{ id = "$($user.Id)"; method = 'GET'; url = "/users/$($user.Id)/authentication/methods" })
}
$responses = Invoke-MgGraphBatchRequest -Requests $requests -Activity 'Getting authentication methods'

$responses = Invoke-MgGraphBatchRequest -Requests $requests -GraphVersion 'v1.0'

Type: System.Collections.Generic.List`1[System.Collections.Hashtable]
Parameter Sets: (All)
Aliases:

Required: True
Position: 1
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

Type: String
Parameter Sets: (All)
Aliases:

Required: False
Position: 2
Default value: Beta
Accept pipeline input: False
Accept wildcard characters: False

Type: Int32
Parameter Sets: (All)
Aliases:

Required: False
Position: 3
Default value: 5
Accept pipeline input: False
Accept wildcard characters: False

Type: String
Parameter Sets: (All)
Aliases:

Required: False
Position: 4
Default value: Processing Graph batch requests
Accept pipeline input: False
Accept wildcard characters: False