Test-ManagedIdentity.ps1

## On the NEW VM in which User Assigned Managed Identity enabled
# Enter-PSSession -ComputerName $vmPIP -Credential $credential

# Install NuGet package provider where Az module is availble 
Install-PackageProvider -Name NuGet -Force

# Install the Az module
Install-Module -Name Az -Force

# Login to Azure with managed identity
Login-AzAccount -Identity

# Get the secret from the Key Vault
$kvName = 'testakv99'
$keyName = 'sysadmin'
$Secret = Get-AzKeyVaultSecret -VaultName $kvName -Name $keyName | % SecretValueText

# You can use this secret in your code, since it is a demo I am writing it to screen
Write-Host "The password is: $Secret"