Two parts:
User registration and management, FinacialAdministration included.

User property registration and management. Thinks like [[Ad]] drafting, publisher->property [[Tag]] management.
{{{
Document -or- specify how Users have things to enter/provide to Your system
}}}

[[Image(ERD:Controller:controller:users)]]

{{{
User(GUID)->properties[]->tags[]
User(GUID)->ads[]->tags[]

Login(User(GUID)->publicKey) = PassKey
}}}