Retrieves the token needed to make calls to the main.iam.ad.ext.azure.com/api/ Azure API

Get-AzPortalToken.ps1

#Requires -module Az.Accounts
function Get-AzPortalToken {
	<#
	.SYNOPSIS
		Refreshes the API token if required
	.OUTPUTS
	API Token Object
	.NOTES
	Inspired by https://github.com/Azure/azure-powershell/issues/7525#issuecomment-432384270
	Stolen from https://github.com/JustinGrote/Az.PortalAPI/blob/master/Az.PortalAPI/Public/Get-Token.ps1
	#>
	
	[CmdletBinding(SupportsShouldProcess)]
	param (
		#Your Azure Context. This will be discovered automatically if you have already logged in with Connect-AzAccount
		[Microsoft.Azure.Commands.Profile.Models.Core.PSAzureContext]
		$Context = (Get-AzContext | Select-Object -first 1),
	
		#The application resource principal you wish to request a token for. Defaults to the Undocumented Azure Portal API
		#Common Examples: https://management.core.windows.net/ https://graph.windows.net/
		$Resource = '74658136-14ec-4630-ad9b-26e160ff0fc6'
	)
	
	if (-not $Context) {
		Connect-AZAccount -ErrorAction Stop
		$Context = (Get-AzContext | Select-Object -first 1)
	}
	
	[Microsoft.Azure.Commands.Common.Authentication.AzureSession]::Instance.AuthenticationFactory.Authenticate($context.Account, $context.Environment, $context.Tenant.Id, $null, "Never", $null, $Resource)
}