Authentication in Realm is wrapped in nested namespaces, which makes the process not entirely straightforward. I believe we should rethink the way authentication is done and come up with a more ergonomic interface.

For example:
```jsx
// login
const creds = Realm.Credentials.emailPassword(email, password);
await app.logIn(creds);

// register
await app.emailPasswordAuth.registerUser(

);
```

In most cases, all required parameters for authentication are nested. Perhaps something like:
```jsx
import

from '@realm/auth'

emailPassword.login()
emailPassword.register()

```