This updates the username code, basically I for now take for granted

This updates the username code, basically I for now take for granted
we do *not* have a username table. This is right, we basically store
non relational users. Due to the design of Monet this has no performance
hit on lookup but does reduce the complexity of inserting/updating
considerably.

Taking this approach will require us to write our own authentication
mechanism to authenticate against the main api. But makes authentication
by itself a problems for an other part of the project to solve.