我正在尝试找到一种方法，使用powershell从部署服务器脚本任务将应用程序服务更新部署到azure应用程序服务。
我在验证部分遇到了问题。
注：贷记https://markheath.net/post/deploy-azure-webapp-kudu-zip-api 对于剧本的想法。
下面是我的powershell脚本。

$PublishingUsername = ["The value of the userName property name in the Azure PublishSettings file"]

$PublishingPassword = ["The value of the userPWD property name in the Azure PublishSettings file"]

$SlotName = ["The name of the slot. I.e. qa"]

$WebAppName = ["The name of the app service in Azure"]

$LocalPath = ["The location of zip file that holds the VS2017 Publish Output files"]

function Upload-ZipDeploy() {

    $pair = "$($PublishingUsername):$($PublishingPassword)"
    $encodedCreds = [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes($pair))
    $basicAuthValue = "Basic $encodedCreds"

    $Headers = @{
        Authorization = $basicAuthValue
    }

    if ($SlotName -eq ""){
        $kuduApiUrl = "https://$WebAppName.scm.azurewebsites.net/api/zipdeploy"
    }
    else{
        $kuduApiUrl = "https://$WebAppName`-$SlotName.scm.azurewebsites.net/api/zipdeploy"
    }

    # use kudu deploy from zip file
    Invoke-WebRequest -Uri $kuduApiUrl -Headers $Headers `
        -InFile $LocalPath -ContentType "multipart/form-data" -Method Post

}

Upload-ZipDeploy

当我运行这个脚本时

Invoke-WebRequest : Server Error
401 - Unauthorized: Access is denied due to invalid credentials.
You do not have permission to view this directory or page using the 
credentials that you supplied.

我正在使用我下载的*.publishsettings文件中的username和userpwd值进行azure中的应用程序服务部署槽设置。我可以在vs2017的发布向导中导入相同的*.publishsettings文件，并成功发布到该插槽。我只是在powershell里做不到。
我错过了什么？