import {composeAll, composeWithTracker} from 'mantra-core';
import MyComponent from '../components/my_component.jsx';
import {authComposer} from 'meteor-auth';

// ...

return composeAll(
  composeWithTracker(authComposer),
)(MyComponent);

import React form 'react'

const MyComponent = ({loggedIn, loggingIn}) => (
  {
    loggedIn ? <div>Welcome</div> :
    loggingIn ? <div>Loading...</div> : <div>Please log in</div>
  }
);

import React form 'react'
import {EnsureLoggedIn} from 'meteor-auth';

const MyComponent = () => (
  <EnsureLoggedIn>
    <div>Welcome</div>
  </EnsureLoggedIn>
);

const Dashboard = () => (
  <EnsureLoggedIn unauthenticatedMessage={NotLoggedInMessage}>
    <DashboardView />
  </EnsureLoggedIn>
);

const NotLoggedInMessage = (
  <div>
    Please login. <a href="/">Go back to the main page</a>.
  </div>
);