# Authorization Contexts

There are also times where you need to validate custom conditions and block access to certain areas. This way, you can implement your own custom security logic and leverage **cbSecurity** for blockage. You will accomplish this via the `secureWhen()` method:

```javascript
secureWhen( context, [errorMessage] )
```

The `context` can be a closure/lambda/udf or a boolean evaluation:

```javascript
// Using as a closure/lambda
cbSecurity.secureWhen( ( user ) => !user.isConfirmed() )
cbSecurity.secureWhen( ( user ) => !oEntry.canPublish( user ) )

// Using a boolean evaluation
cbSecurity.secureWhen( cbSecurity.none( "AUTHOR_ADMIN" ) && !cbSecurity.sameUser( oAuthor )  )
cbSecurity.whenNone( "AUTHOR_ADMIN", ( user ) => relocate() );
```

The closure/udf will receive the currently authenticated user as the first argument.

```javascript
( user ) => {}
function( user );
```