refactor: use await in deleteUser API

Author: venki91

lib/index.js

@@ -667,13 +667,9 @@ class ErrsolePostgres extends EventEmitter {
     if (!id) throw new Error('User ID is required.');
 
     const query = 'DELETE FROM errsole_users WHERE id = $1';
-    return new Promise((resolve, reject) => {
-      this.pool.query(query, [id], (err, results) => {
-        if (err) return reject(err);
-        if (results.rowCount === 0) return reject(new Error('User not found.'));
-        resolve({});
-      });
-    });
+    const results = await this.pool.query(query, [id]);
+    if (results.rowCount === 0) throw new Error('User not found.');
+    return {};
   }
 }