$session→login() 
Login a user with the given name and password
Also sets them to the current user.
Example
$u = $session->login('bob', 'laj3939$a');
if($u) {
  echo "Welcome Bob";
} else {
  echo "Sorry Bob";
}Usage
// basic usage
$user = $session->login($name, string $pass);
// usage with all arguments
$user = $session->login($name, string $pass, bool $force = false);Arguments
| Name | Type(s) | Description | 
|---|---|---|
| $name | stringUser | May be user name or User object. | 
| $pass | string | Raw, non-hashed password. | 
| $force(optional) | bool | Specify boolean true to login user without requiring a password ($pass argument can be blank, or anything).
You can also use the  | 
Return value
Exceptions
Method can throw exceptions on error:
- WireException
Hooking $session→login(…)
You can add your own hook events that are executed either before or after the $session method is executed. Examples of both are included below. A good place for hook code such as this is in your /site/ready.php file.
Hooking before
The 'before' hooks are called immediately before each $session method call is executed. This type of hook is especially useful for modifying arguments before they are sent to the method.
$this->addHookBefore('Session::login', function(HookEvent $event) {
  // Get the object the event occurred on, if needed
  $session = $event->object;
  // Get values of arguments sent to hook (and optionally modify them)
  $name = $event->arguments(0);
  $pass = $event->arguments(1);
  $force = $event->arguments(2);
  /* Your code here, perhaps modifying arguments */
  // Populate back arguments (if you have modified them)
  $event->arguments(0, $name);
  $event->arguments(1, $pass);
  $event->arguments(2, $force);
});Hooking after
The 'after' hooks are called immediately after each $session method call is executed. This type of hook is especially useful for modifying the value that was returned by the method call.
$this->addHookAfter('Session::login', function(HookEvent $event) {
  // Get the object the event occurred on, if needed
  $session = $event->object;
  // An 'after' hook can retrieve and/or modify the return value
  $return = $event->return;
  // Get values of arguments sent to hook (if needed)
  $name = $event->arguments(0);
  $pass = $event->arguments(1);
  $force = $event->arguments(2);
  /* Your code here, perhaps modifying the return value */
  // Populate back return value, if you have modified it
  $event->return = $return;
});$session methods and properties
API reference based on ProcessWire core version 3.0.252