Retrieve a power automate flow with powershell

Hello, I would like to make a PowerShell script where I use the “GetFlow” function to retrieve a Power Automate flow. But unfortunately when I run my powershell script nothing happens. Could you help me please ? ‌:( Thanks in advance !

Here is my config file:

{
    "tenantId" : "0000000-0000-0000-0000-00000000", 
    "certifThumb" : "QHFHGELGEJGQJFOQQJEQJGJQLKGJQEGJEKL",
    "appId" : "0000000-0000-0000-0000-00000000",
    "triggerHour" : "01:00",
    "outputFile" : ".\\flow-stats.txt",
    "errorsFile" : ".\\flow-errors.txt",
    "dataFile" : ".\\flow-data.json",
    "flows" : [
        {
            "name": "Flux",
            "mailbox": "aaaaaa@aaaa.onmicrosoft.com",
            "serviceAccount" : "PS_FLOW"
        }
    ]
}

(Obviously I changed the confidential values to send the script here)

Here is my powershell script:

$ErrorActionPreference = "Stop"

$PSModulesNames = "Microsoft.PowerApps.PowerShell", "Microsoft.PowerApps.Administration.PowerShell"
$configFileName = "Flow-Stats.config"
$jsonDateFormat = "o" #2022-03-23T16:37:51.8011737+01:00

$PSModulesNames | ForEach-Object {
    Import-Module $_ -EA SilentlyContinue
    $module = Get-Module -Name $_
    if($null -eq $module) {
        throw "Module '$_' not found"
    }
}

$config = Get-Content ".\$configFileName" -Encoding UTF8 -EA SilentlyContinue | ConvertFrom-Json -EA SilentlyContinue
if($null -eq $config) {
    throw "Error reading config file '$configFileName'"
}

#Add-PowerAppsAccount -TenantID $config.tenantId -CertificateThumbprint $config.certifThumb -ApplicationId $config.appId

$data = Get-Content ".\$($config.dataFile)" -Encoding UTF8 -EA SilentlyContinue | ConvertFrom-Json -EA SilentlyContinue
if($null -eq $data) {
    $data = [PSCustomObject]@{
        lastExec = [datetime]::MinValue.ToString($jsonDateFormat)
    }
}
$lastExec = Get-Date $data.lastExec
$now = Get-Date
$flowIds = @{}

function GetFlowRuns {
    param(
        [string] $FlowName,
        [datetime] $Start,
        [datetime] $End
    )
    $runs = @(Get-FlowRun -FlowName $FlowName | Where-Object {
        $date = Get-Date $_.StartTime
        return $date -ge $Start -and $date -lt $End
    })
    $runCount = $runs.Count
    $errors = @($runs | Where-Object { $_.Status -eq "Failed" })
    $errorsCount = $errors.Count
    return [PSCustomObject]@{
        runCount = $runCount
        errorCount = $errorsCount
        errors = $errors | ForEach-Object {
            return [PSCustomObject]@{
                date = (Get-Date $_.StartTime).ToString($jsonDateFormat)
                message = $_.Internal.properties.error.message
            }
        }
    }
}