CakePHP 3.5 Auth use multiple tables - cakephp

Question

I have an Auth process which works fine with one userModel. But not only because of my DB schema I need to have one login method/action which works with multiple models.
So far I've tried everything I was able to think of or find online - for example editing this Cake 1.3 solution into Cake 3 and a few more hints I was able to find.
However, I'm not able to figure it out.
Thank you for any answer.
My AppController component load:
$this->loadComponent('ExtendedAuth', [
'authenticate' => [
'Form' => [
//'userModel' => 'Admins',
'fields' => [
'username' => 'email',
'password' => 'password'
]
]
],
'loginAction' => [
'controller' => 'Admins',
'action' => 'login'
],
// If unauthorized, return them to page they were just on
'unauthorizedRedirect' => $this->referer(),
]);
My ExtendedAuthComponent:
class ExtendedAuthComponent extends AuthComponent
{
function identify($user = null, $conditions = null) {
$models = array('Admins', 'Users');
foreach ($models as $model) {
//$this->userModel = $model; // switch model
parent::setConfig('authenticate', [
AuthComponent::ALL => [
'userModel' => $model
]
]);
$result = parent::identify(); // let cake do its thing
if ($result) {
return $result; // login success
}
}
return null; // login failure
}
}
EDIT1: Description of situation
I have two separate tables (Admins, Users). I need just one login action which tries to use Admins table prior to Users. Because of the application logic I can't combine them to one table with something like 'is_admin' flag. So basically what I need is instead of one specific userModel set in Auth config, I need a set of models. Sounds simple and yet I'm not able to achieve it.
EDIT2: Chosen solution
Based on the answer below, I decided to update my schema. Auth users table is just simplified table with login credentials and role and other role-specific fields are then in separate tables which are used as a connection for other role-specific tables. Even though the answer is not exactly a solution for the asked question, it made me think more about any possible changes of the schema and I found this solution because of it so I'm marking it as a solution. I appreciate all comments as well.

Answer 1

As Mark already said in a comment: Don't use two users tables. Add a type field or role or whatever else and associated data in separate tables if it's different like admin_profiles and user_profiles.
Don't extend the Auth component. I wouldn't recommend to use it anymore any way because it's going to get deprecated in the upcoming 3.7 / 4.0 release. Use the new official authentication and authorization plugins instead.
If you insist on the rocky path and want to make your life harder, well go for it but then you should still not extend the auth component but instead write a custom authentication adapter. This is the right place to implement your custom 2-table-weirdness. Read this section of the manual on how to do it.