MAPG-199 fix issues found by PHPStan

src/PersistentData/Model/User.php

@@ -45,9 +45,9 @@ class User extends Model implements IUser
         }
     }
 
-    public function setActive($active): void
+    public function setActive(bool $active): void
     {
-        $this->active = (bool) $active;
+        $this->active = $active;
     }
 
     public function setGoogleSub(?string $googleSub): void
@@ -105,10 +105,10 @@ class User extends Model implements IUser
         switch ($permission) {
             case IUser::PERMISSION_NORMAL:
                 return true;
-                break;
             case IUser::PERMISSION_ADMIN:
                 return $this->type === 'admin';
-                break;
+            default:
+                throw new \Exception('Permission does not exist: ' . $permission);
         }
     }
 
@@ -124,6 +124,10 @@ class User extends Model implements IUser
 
     public function checkPassword(string $password): bool
     {
+        if ($this->password === null) {
+            return false;
+        }
+
         return password_verify($password, $this->password);
     }
 }