Simplified factory to create an for Facebook.

- `Anything`
  - `Object`
    - `Basic` ...and other supertypes
      - `FacebookAuth`

- `FacebookAuth`
  - `Basic`
    - `Identifiable`
    - `Object`
      - `Anything`

no subtypes hierarchy

Initializer
`FacebookAuth(FacebookAuth unknown)`

Inherited Attributes
Attributes inherited from: `Object` `hash`, `string`

Inherited Methods
Methods inherited from: `Object` `equals`