text: //@flow
  'use-strict';
  import firebase from '../';
  export default () => {
  	return new Promise((response, reject) => {
  		firebase.auth().signOut().then(() => {
  		  // Sign-out successful.
  		  response()
  		},(error) => {
  		  // An error happened.
  		  reject(error)
  		});
  	})
  	
  
  }
  