very simple decoder for scripts in graph

ConvertFrom-Base64EncodedString.ps1

function ConvertFrom-Base64EncodedString {
    [cmdletbinding()]
    param (
        [string]$encodedString
    )
    try {
        $decodedOutput = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($encodedString))
        return $decodedOutput
    }
    catch {
        Write-Warning $_.exception.message
    }
}

function ConvertTo-Base64EncodedString {
    [cmdletbinding()]
    param (
        [string]$inputString
    )
    try {
        $EncodedString = [Convert]::ToBase64String([System.Text.Encoding]::UTF8.GetBytes($inputString))
        return $EncodedString
    }
    catch {
        Write-Warning $_.exception.message
    }
}