Function hasSlackInviteBeenSent

server/src/notifications/email.ts:1119–1124

(workosUserId: string)

 * Check if we've already sent a Slack invite email to this user
 */
export async function hasSlackInviteBeenSent(workosUserId: string): Promise<boolean> {
  return emailDb.hasEmailBeenSent({
    email_type: 'slack_invite',
    workos_user_id: workosUserId,
  });
}

/**
 * Send Slack invite email to website-only users