how to use hook_user_login to catch username and password

Question

I am trying to catch the username and password which are entered on the user login form. This is my code:

function impak_integration_user_login(&$edit, $account) {
  drupal_set_message("Welcome User!" . print_r($edit). print_r($account));
  global $user;
  drupal_set_message(print_r($user));
  }

The hook does work, as It does print out the Welcome message after login. However, I can't figure out how to get any of the user information, specifically the entered username and password.

Answer 1

The information send in the login form is in the $edit array. You can get this information as follows:

function YOURMODULE_user_login(&$edit, $account) {
  $username = $edit['input']['name'];
  $password = $edit['input']['pass'];
  drupal_set_message("Welcome $username your password is $password");
}

Answer 2

Think twice why you need to do something before login! As one of the possible answer
- In order to catch the user login, you can implement hook_form_alter() as below

/**
* Implements hook_form_alter().
*/
function MYMODULE_form_alter(&$form, $form_state, $form_id) {
  switch ($form_id) {
    case 'user_login_block':
    case 'user_login' :
      array_unshift($form['#submit'], 'custom_login_submit');
      break;
  }
}

/**
* Custom submit handler
*/
function custom_login_submit($form, &$form_state) {
  //code here
  dpm($form_state);
}

clearly you will get both things in $formstate

The reason you might not be getting pass in hook_user_login() is because it is called after login.