div(class="row")
  div(class="col-md-4 col-md-offset-4")
    form(ng-submit="signup()", id="signup-form", novalidate)
      div(class="form-group")
        label Email
        input(ng-model="signup.identifier", class="form-control", type="email" required)
      div(class="form-group")
        label Password
        input(ng-model="signup.password", class="form-control", type="password" required)
      div(class="row")
        div(class="col-md-6")
          div(class="form-group")
            label First Name
            input(ng-model="signup.first_name", class="form-control", type="text" required)
        div(class="col-md-6")
          div(class="form-group")
            label Last Name
            input(ng-model="signup.last_name", class="form-control", type="text" required)                            
      div(class="btn-toolbar")
        button(type="submit", class="btn btn-block btn-primary") Signup

div(class="row")
  div(class="col-md-4 col-md-offset-4")
    form(ng-submit="signup()", id="signup-form", name="signupForm", novalidate)
      div(class="form-group")
        label Email
        input(ng-model="signup.identifier", class="form-control", type="email", 
              name="email", required)
      div(class="form-group")
        label Password
        input(ng-model="signup.password", class="form-control", type="password", 
              name="password", required)
      div(class="row")
        div(class="col-md-6")
          div(class="form-group")
            label First Name
            input(ng-model="signup.first_name", ng-minlength=1, ng-maxlength=50, 
                  class="form-control", type="text", name="firstName", required)
        div(class="col-md-6")
          div(class="form-group")
            label Last Name
            input(ng-model="signup.last_name", ng-minlength=1, ng-maxlength=50, 
                  class="form-control", type="text", name="firstName",  required)                            
      div(class="btn-toolbar")
        button(type="submit", class="btn btn-block btn-primary") Signup

Add names to input props
Add names to input props
