Powershell script to get the refresh token expiry

Question

Hi All,
I am currently working on a PS script to generate OAuth 2 access tokens(having shorter expiry) using refresh token(having longer expiry).
I do have the code figured out for this but would need help to have a code to be able to identify the expiry of the refresh token. Based on this expiry, the code should be able to generate emails(reminders) to generate a new refresh token.
I tried checking ‘expires_in’ property but it is a static value, i wanted more of countdown.
Any help would be appreciated.

Thanks,
Devender

Answer 1

# Set the expiry time of the refresh token (in seconds)
$refreshTokenExpiry = 3600

# Generate the refresh token and store it in $refreshToken
# ...

# Calculate the expiry time of the refresh token
$expiryTime = (Get-Date).AddSeconds($refreshTokenExpiry)

# Schedule email reminders based on the remaining time until the token expires
$reminderIntervals = @(1800, 600, 60)  # Remind 30 mins, 10 mins, and 1 min before expiry

foreach ($interval in $reminderIntervals) {
    $reminderTime = $expiryTime.AddSeconds(-$interval)
    Register-ScheduledTask -TaskName "Refresh Token Expiry Reminder" `
        -Trigger (New-ScheduledTaskTrigger -Once -At $reminderTime) `
        -Action {
            # Send email reminder
            Send-MailMessage -To "user@example.com" -Subject "Refresh token will expire soon" `
                -Body "Your refresh token will expire in $($interval / 60) minutes."
        }
}