update unit21 on email capture

[ocasta181]

1. Restart your service to get a clean db.
2. create a new account and validate your email
3. check unit21 for the newly created entity. your email should be associated with the entity
4. If you set the username using insomnia or postman, you should also see this associated with the entity in unit21

[auroter]

I believe this is what's intended:

And it looks like the instruments are associated with the user as well:

As a side note, we might be off by a decimal place when submitting transaction values to Unit21:

(Total was $1.97)

[alcalawil]

[alcalawil]

LGTM