Issue in connecting Azure Ad user api command from PNP online PS script

I have created a Powershell script in Azure function app. Have connected pnponline using Client id and thumbprint by creating an App registration with Graph API. The code is as below.

Connect-PnPOnline -Url $adminSiteUrl -ClientId $clientId -Thumbprint $Thumbprint -Tenant "$($tenantName).onmicrosoft.com"
Write-Information "Connected Pnp online Successful"
$AzureAd = Get-PnPAzureADUser | Select-object Mail,DisplayName,UserPrincipalName

Pnp online script has connected successfully but on executing the last line Get-PnpAzureADUser, i am getting the error as below.

Error:

The provided value for scope User.Read.All is not valid. Client credential flows must have a scope value with /.default suffixed to the resource identifier (application ID URI).

Please help me on this issue.