The form does not work when clicked

I'm trying to make a form with angularjs 1.5 to obtain the token of a server, but when clicking, I do not get any result or error message.

Use AngularUI Router to set the route of the form ...

      // otras rutas
      .state('login', {
        url: '/login',
        templateUrl: '/app/auth/_login.form.html',
        controler: 'LoginController',
        controllerAs:'in'
      });
      // otras rutas

And I can visualize my form correctly:

<!-- Archivo: /app/auth/_login.form.html -->
<div class="row">
  <div class="offset-sm-3 col-sm-6">
    <h2>Formulario de Ingreso</h2>
    <form role="form" name="form">
      <div class="form-group">
        <label for="username">Nombre de Usuario</label>
        <input type="text" data-ng-model="in.credentials.username" name="username" id="username" class="form-control" required />
        <span></span>
      </div>
      <div class="form-group">
        <label for="password">Contraseña</label>
        <input type="password" data-ng-model="in.credentials.password" name="password" class="form-control"  id="password" />
      </div>
      <div class="form-actions">
        <button data-ng-submit="in.login(in.credentials)" type="submit" id="submit" class="btn btn-primary">Ingresar</button>
      </div>
    </form>
  </div>
</div>

On the send button, I set that when I click, I will call the function in.login() with credentials as parameter. This is the controller.

(function(angular){
  'use strict';

  function LoginController($scope, $rootScope, auth, session){
    var self = this;
    var _credentials = $scope.credentials;

    var _login = function(_credentials){
      // console.log(_credentials);
      // ^^^^^^^^^^^^^^^^^^^^^^^^^^ Esta línea **nunca se ejecuta**
      auth
        .logIn(_credentials)
        .then(function(){
          _user = session.getUser();
        });
    };

    self.login = _login;
    self.credentials = _credentials;
  }

  LoginController.$inject = ['$scope', '$rootScope', 'auth', 'session'];

  angular.module('cmi')
    .controller('LoginController', LoginController);

})(angular);

The dependencies auth and session are services that request the Token and save it in LocalStorage and, according to me , its functioning is already verified.

Problem

When you click on the Enter button, nothing happens. There are no error messages in the console and the debug line I placed inside _login() never runs.

I would like to know what I am doing wrong and how to correct my error.

The expected result is as follows: I type the username and password and press the send button. These two data are passed to the service auth that sends them to the server that returns a token. But I can not get past the first step.

Thank you.