Confirmation E-Mail not sent

**Describe the bug**
Trefle sign up confirmation e-mail is not sent. However this is mandatory in order to obtain an API key.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to Trefle IO
2. Sign up
3. Wait until infinity for a confirmation-email

**Expected behavior**
Get confirmation e-mail in order to complete registration and obtain API key
