If you already have an account, you can log in via the website or the Mobile Vikings application. At the top right you will see the My Viking button, where you can both log in and out.

You can log in using your email address or phone number. Does it not work with your email address? Then try logging in with your phone number, and vice versa. Make sure your phone or device isn't automatically putting a capital letter at the start.

If both your number and email address don't work or you've forgotten your password, try changing your password. Didn't receive an email? Don't forget to take a look in your spam folder.