{{ define "main" }} {{ if .Forbidden }} <article> <p class="error-message">Invalid username or password</p> </article> {{ end }} <form action="/login" method="post"> <fieldset> <label> Username <input type="text" placeholder="Username" name="username" value="{{ .Username }}" {{ if .Forbidden }}aria-invalid="true"{{ end }} required> </label> <label> Password <input type="password" placeholder="Password" name="password" {{ if .Forbidden }}aria-invalid="true"{{ end }} required> </label> </fieldset> <button type="submit" value="login">Login</button> </form> {{ end }}