Add App Catalog to SharePoint site

$site = "https://contoso.sharepoint.com/sites/site"
Connect-PnPOnline $site
Add-PnPSiteCollectionAppCatalog -Site $site
Write-output "App Catalog Created on " $site

$AdminSiteURL = "https://domain-admin.sharepoint.com"
$Username = "chandani@domain.onmicrosoft.com"
$Password = "******"
$SecureStringPwd = $Password | ConvertTo-SecureString -AsPlainText -Force 
$Cred = New-Object System.Management.Automation.PSCredential -ArgumentList $Username, $SecureStringPwd

Function Login() {
    [cmdletbinding()]
    param([parameter(Mandatory = $true, ValueFromPipeline = $true)] $creds)
    Write-Host "Connecting to Tenant Admin Site '$($AdminSiteURL)'" -f Yellow   
    Connect-SPOService -url $AdminCenterURL -Credential $Cred
    Write-Host "Connection Successfull" -f Green 
}

Function AddAppCatalogToSiteCollection {
    $SiteURL = Read-Host "Enter Site URL"
    $Site = Get-SPOSite $SiteURL 
    Write-Host "Adding SharePoint site collection app catalog..." -f Yellow
    Add-SPOSiteCollectionAppCatalog -Site $Site
    Write-Host "Added SharePoint site collection app catalog successfully..." -f Green
}

Function StartProcessing {
    Login($Cred);
    AddAppCatalogToSiteCollection
}

StartProcessing

# SharePoint online site URL
$siteUrl = "https://contoso.sharepoint.com/sites/SPConnect"

# Get Credentials to connect
$m365Status = m365 status
if ($m365Status -match "Logged Out") {
   m365 login
}

# Add site collection app catalog
m365 spo site appcatalog add --siteUrl $siteUrl