Admin.php

<?php

// this is another kind of user.
class Admin extends Model {
  
  protected $fillable = ['public_key'];
  
  public function identity() {
    return $this->morphMany(Identity::class, 'identifiable');
  }
  
  
}

Identity.php

<?php

// this is what laravel calls a "user". When logging in, match against this.
// it also has identifiable_id and identifiable_type columns.
class Identity extends Model {
  
  protected $fillable = ['email', 'password'];
  
  public function user() {
    return $this->morphTo();
  }
  
}

Member.php

<?php

// this is one kind of user.
class Member extends Model {
  
  protected $fillable = ['name'];
  
  public function identity() {
    return $this->morphMany(Identity::class, 'identifiable');
  }
  
  
}

SomeController.php

<?php

class SomeController extends Controller {
  
  // you can grab the user's "user" (i.e. Member or Admin) from Auth::user()->user.
  // yea, kinda weird, change the wording if it seems ambiguous to you.
  
  public function showUser(Identity $identity) {
    
    if ($identity->user instanceof Admin) {
      return View::make('admin.panel', $identity->user);
    } else {
      return View::make('user.panel', $identity->user);
    }
    
    
  }
  
}

Perfect example, thanks!