Delegated Registration
For this tutorial, you will register a Dfns EndUser, and this is where the registration flow starts. However, in your final app, the flow may be different and the username might come from your internal system.
After registration, the new end user will have an Ethereum testnet wallet and assigned the system permission, `DfnsDefaultEndUserAccess`, that grants the end user full access to their wallets.
Enter the email as the username you are registering, and hit the "Register EndUser" button.