Programmatic Demo of Login Flow

It would be great to have an example app of how to correctly do the following

* Search for MX Bank `Atrium::Institution.list(query_params: {name: name}, limit: limit)`
* Create a User `Atrium::User.create()`
* Create a Member `Atrium::Member.create()`
* Handle MFA or challenges
* Check aggregation status
* Pull in Transactions
* Remove a Member
* Delete a User
