Finalize the api project for the mobile application

PHP Yii2 middle level, with experience
At the moment, an api has been implemented for a mobile application with a beautiful and correct architecture. It is necessary to supplement the api with a couple of queries and correct errors when outputting data and writing to the database. Also a couple of fixes on the template admin panel attached to the api.
The amount in stages, we will do everything according to the beauty
All codes forward if possible, then by NDA
Write immediately TG