clerk = Clerk::SDK.new(api_key: "your_api_key")
user = clerk.users.all(limit: 1).first
# Extract their primary email address ID
email_id = user["primary_email_address_id"]
# Send them a welcome email
email_address_id: email_id,
from_email_name: "welcome",
subject: "Welcome to MyApp",
body: "Welcome to MyApp, #{user["first_name"]}",