```ruby
User.create!(username: "michael", password: "foobar")
User.create!(username: "lee",     password: "asdfasdf")
User.create!(username: "nick",    password: "fdsafdsa")```

Switch to Alice & Bob
user
```ruby
User.create!(username: "alice", password: "wonderland")
User.create!(username: "bob",   password: "asdfasdf")
```
assistant