Fix columnExists query

src/classes/database.php

@@ -74,12 +74,14 @@ class Database
 
     public function columnExists(string $table_to_check, string $column_to_check): bool
     {
-        $result = $this->query(
+        $result = $this
+        ->query(
             'SELECT *
                FROM `INFORMATION_SCHEMA`.`COLUMNS`
               WHERE TABLE_NAME  = "' . $table_to_check . '"
                 AND COLUMN_NAME = "' . $column_to_check . '"'
-        );
+        )
+        ->fetch();
         $exists = false !== $result;
 
         return $exists;