We have added two-factor authentication on our system.  Visit the Your Account page on the profile icon menu (top right) to set it up.  We have recently seen an increase in unauthorised access on accounts due to weak or re-used passwords.  You remain responsible for the security of your account.  If your account is breached, it could have real financial implications for your business, these "hackers" like to change your banking details, or send spam SMS messages to your clients & suppliers.