If you are using a personal account, run az login & az account show to check you are logged in.
If you are using an Azure Service Principal for authentication, run
export ARM_CLIENT_ID=REPLACE_ME
export ARM_CLIENT_SECRET=REPLACE_ME
export ARM_SUBSCRIPTION_ID=REPLACE_ME
export ARM_TENANT_ID=REPLACE_ME
export ARM_USE_CLI=false
make first-deploy
# Browse to the URL printed in the console
make destroy