Sign in system with Meteor --> https://github.com/LeCoupa/awesome-cheatsheets

meteor.signin.html

<template name="SignIn">

    <form action="/signin" id="signInForm" method="post">
        <input id="signInEmail" type="text" name="email" placeholder="Email Address">
        <input id="signInPassword" type="password" name="password" placeholder="Password">
        <input class="btn-submit" type="submit" value="Sign In">
    </form>
    <!-- end #sign-in-form -->

</template>

meteor.signin.js

Template.SignIn.events({
  'submit #signInForm': function(e, t) {
    e.preventDefault();

    var signInForm = $(e.currentTarget),
        email = trimInput(signInForm.find('.email').val().toLowerCase()),
        password = signInForm.find('.password').val();

    if (isNotEmpty(email) && isEmail(email) && isNotEmpty(password) && isValidPassword(password)) {
    
      Meteor.loginWithPassword(email, password, function(err) {
        if (err) {
          console.log('These credentials are not valid.');
        } else {
          console.log('Welcome back Meteorite!');
        }
      });

    }
    return false;
  },
});