You need to create an account at Tekos, please make sure to use the same email address used during the subscription!
Click on ‘Setup your instance’ button and follow the steps
Alternatively, you can talk to TekosBot and say ‘setup flow instance’
If have choosen a plan with a trial period and you do not want to continue using Tekos, simply cancel before your trial ends and you will not be charged. Otherwise, you will pay a subscription as long as your account is open. You can cancel your plan at any time.