# Authentication Service

The authentication service can be used by injecting it using WireBox:

```javascript
property name="auth" inject="authenticationService@cbauth";

// OR

var auth = wirebox.getInstance( "authenticationService@cbauth" );
```

Or, the quick way, you can just use the `auth()` helper method (which is actually just a shortcut to a wirebox injection). The `auth()` helper is very useful in views. And since Wirebox handles singleton management, you don't have to worry about calling `auth()`too many times.

{% hint style="success" %}
The `auth()` helper is available in handlers, layouts, and views.  You will need to use the injection if you need cbauth in other models.
{% endhint %}

## Methods

### login

| argument | type | required | default | description                                                                       |
| -------- | ---- | -------- | ------- | --------------------------------------------------------------------------------- |
| user     | any  | `true`   |         | The user component to log in. The component must respond to the `getId()` method. |

Logs a user in to the system. The returned user component must respond to the `getId()` method (as defined in the [`IAuthUser`](/iauthuser.md) interface). Additionally, the user is cached in the `request` scope. If a user is already in the session, this will replace it with the given user. This method returns the passed in `user` object.

### logout

| argument     | type | required | default | description |
| ------------ | ---- | -------- | ------- | ----------- |
| No arguments |      |          |         |             |

Logs a user out of system. This method can be called regardless of if there is currently a logged in user.

### authenticate

| argument | type   | required | default | description                        |
| -------- | ------ | -------- | ------- | ---------------------------------- |
| username | string | `true`   |         | The username to attempt to log in. |
| password | string | `true`   |         | The password to attempt to log in. |

Attempts to log a user by calling the `retrieveUserByUsername` and `isValidCredentials` on the provided `userServiceClass`. If `isValidCredentials` returns `false`, it throws a `InvalidCredentials` exception.

If it succeeds, it returns the logged in `user` object. If it succeeds, it also sets the user id (obtained by calling `getId()` on the returned user component) in the configured `sessionStorage` and the returned user component in the configured `requestStorage`.

### isLoggedIn

| argument     | type | required | default | description |
| ------------ | ---- | -------- | ------- | ----------- |
| no arguments |      |          |         |             |

Returns `boolean` whether a user is logged in to the system. 

### check

| argument     | type | required | default | description |
| ------------ | ---- | -------- | ------- | ----------- |
| no arguments |      |          |         |             |

Alias for `isLoggedIn`

### guest

| argument     | type | required | default | description |
| ------------ | ---- | -------- | ------- | ----------- |
| no arguments |      |          |         |             |

Returns whether a user is logged out of the system.  Opposite of `check()` and `isLoggedIn()`.

### getUser

| argument     | type | required | default | description |
| ------------ | ---- | -------- | ------- | ----------- |
| no arguments |      |          |         |             |

Returns the currently logged in user component.

If there is no logged in user, it throws a `NoUserLoggedIn` exception.

If there is a user object in the configured `requestStorage`, it is returned.

If the user object has not been fetched this request, it uses the id set in the configured `sessionStorage` to fetch the user (using `retrieveUserById`). It then sets the user in the configured `requestStorage` so subsequent calls to `getUser` don't re-fetch the user.

### user

| argument     | type | required | default | description |
| ------------ | ---- | -------- | ------- | ----------- |
| no arguments |      |          |         |             |

Alias for `getUser`

### getUserId

| argument | type | required | default | description |
| -------- | ---- | -------- | ------- | ----------- |
|          |      |          |         |             |

Returns the currently logged in user id.

If there is no logged in user, it throws a `NoUserLoggedIn` exception.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://cbauth.ortusbooks.com/authentication-service.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.