app/views/users/login.html.erb
<%= render 'shared/alert_message'%>
<div class="auth-form-header">
<h1>Login</h1>
</div>
<%= form_for @user, url: '/login' do |f|%>
<div class="form-group auth-form">
<div class="input">
<%= label_tag 'Email' %><br />
<%= f.text_field :username, class: "form-control" %>
<span><i class="fa fa-envelope-o"></i></span>
</div>
<div class="input">
<%= f.label 'Password' %><br />
<%= f.password_field :passwd %>
<span><i class="fa fa-lock"></i></span>
</div>
<div class="checkbox-inline">
<label class="checkbox"><%= f.check_box :remember_me %>Remember me</label>
</div>
<div class="form-group">
<%= f.submit "Log in", class: "btn btn-default btn-lg active" %>
</div>
<div class="form-group">
<a href="/forgot">Forgot your password?</a>
</div>
<br /><br />
<p>
<%= link_to 'auth/github', class: "btn btn-primary btn-lg active" do%>
<i class="fa fa-github-square fa-1x"></i> Log in with Github
<%end %>
</p>
<%= render 'shared/alert_message'%>
</div>
<% end %>