Create user via rest api

How to create user via rest api and authenticate them ?

Create a file: cockpit/config/api/user/register.php

<?php
        $uname = $this->param('name');
        $username = $this->param('username');
        $email = $this->param('email');
        $password = $this->param('password');
        $role = $this->param('role');
        $created= time();



 $app = Cockpit::instance();
 
   $checkuser = $app->dataStorage->findOne('system/users', ['user' => $username]);
   $checkemail = $app->dataStorage->findOne('system/users', ['user' => $email]);

        if (!$checkuser  && !$checkemail) {
              $user = [
         'active' => true,   
        'name' => $uname,
        'user' => $username,
        'email' => $email,
        'password' => $app->hash('$password'),
        'i18n' => 'en',
        'role' => $role,
        'theme' => 'auto',
        '_modified' => $created,
        '_created' => $created
         ];
         
         
     $app->dataStorage->save('system/users', $user);
            return [
    'status' => 'success'];   
           
        }
        
        else{
              if($checkuser){return $this->stop(['error' => 'username already exist'], 412);}
              
              if($checkemail){return $this->stop(['error' => 'email already exist'], 412);}
              
        }

?>

Now from your app use curl to send relevant user registration data to route cockpit/api/user/auth

Tweak the above code as per as your convenience. I hope it helps. Cheers