router.post('/signup', function(err, req, res, next){
    var username = req.body.username;
    var fname = req.body.fname;
    var lname = req.body.lname;
    var email = req.body.email;
    var password = req.body.password;

    database.createUserWithEmailAndPassword(email, password, username, fname, lname);
    //This is causing redirect to 404 page. Want to just stay here.
    if (err){
      alert('Email has already been registered');
    } else {
      res.redirect('/');
    }

});

exports.createUserWithEmailAndPassword = function(email, password, username, fname, lname){
  if (!email || !password || !username || !fname || !lname){
    console.log ('email: ' +  email);
    console.log ('password: ' +  password);
    console.log ('username: ' +  username);
    console.log ('fname: ' +  fname);
    console.log ('lname: ' +  lname);
    throw Error('You are missing information');
  }
  firebase.auth().createUserWithEmailAndPassword(email, password).then(function(user){
    firebase.database().ref('users/' + username).set({
      email: email,
      fname : fname,
      lname : lname
    });
  }).catch(function(error) {
    // Handle Errors here.
    var errorCode = error.code;
    console.log('ERROR CODE: ' + errorCode);
    var errorMessage = error.message;
    console.log('ERROR MESSAGE' + errorMessage);
    throw Error('Unable to save user.')
  });
};