new getDevices(config)
Gets the list of available media devices (Audio and Video) in the browser/app
Parameters:
| Name | Type | Description | 
|---|---|---|
config | 
            
            object | getUserMedia constraints  | 
        
Returns:
- Type
 - Promise.<ListDevices>
 
Example
usecases.getDevices({audio: true, video: true})
    .then((devices) => {
        console.log(devices.videoDevices); // [{label: 'Camera Front', id: *****}]
        console.log(devices.audioDevices); // [{label: 'Microphone', id: *****}]
    })