Represents an authenticates User and contains operations to authorise the user.

Please consult the documentation for a detailed explanation.

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

- `User`
  - `Basic`
    - `Identifiable`
    - `Object`
      - `Anything`

- `User`
  - `AccessToken`

Initializer
`User(User unknown)`

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

Methods
`clearCache` | `shared default User clearCache()` The User object will cache any authorities that it knows it has to avoid hitting the underlying auth provider each time. Use this method if you want to clear this cache.
`isAuthorised` | `shared default User isAuthorised(String authority, Anything(Throwable|Boolean) resultHandler)` Is the user authorised to Parameters: `authority` the authority - what this really means is determined by the specific implementation. It might represent a permission to access a resource e.g. `printers:printer34` or it might represent authority to a role in a roles based model, e.g. `role:admin`. `resultHandler` handler that will be called with an async result containing the value `true` if the they has the authority or `false` otherwise.
`principal` | `shared default Object principal()` Get the underlying principal for the User. What this actually returns depends on the implementation. For a simple user/password based auth, it's likely to contain a JSON object with the following structure:
       {
         "username", "tim"
       }
`setAuthProvider` | `shared default void setAuthProvider(AuthProvider authProvider)` Set the auth provider for the User. This is typically used to reattach a detached User with an AuthProvider, e.g. after it has been deserialized. Parameters: `authProvider` the AuthProvider - this must be the same type of AuthProvider that originally created the User

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