When creating your Arke account, or changing the email address for your Arke account, you will be asked to verify your email address.
The 'change your email address' screen
To confirm that you own the email address you're trying to sign up with, we'll send a verification code to that email address first, that you can enter during the sign-up process.
An example verification code sent via email
You can enter this code into the 'Verification code' field:
Next, re-enter your password in the 'Password' field and click 'Verify email address':
Did you not receive the verification email? Check this article