doctrine orm multiple databases User entity class not found

trying to setup postgres alongside mariadb in my symfony 6 project to migrate my database.

following the guide here

and my entity is called User

SO I have setup two databases in doctrine.yaml

doctrine:
    dbal:
        default_connection: mariadb
        connections:
            mariadb:
                server_version:    '%env(DATABASE_VERSION)%'
                dbname:            '%env(DATABASE_NAME)%'
                host:              '%env(DATABASE_HOST)%'
                port:              '%env(DATABASE_PORT)%'
                user:              '%env(DATABASE_USER)%'
                password:          '%env(DATABASE_PASSWORD)%'
                driver:            '%env(DATABASE_DRIVER)%'
                charset:            UTF8
                options:
                    !php/const PDO::MYSQL_ATTR_SSL_KEY: '%DATABASE_PUB_KEY%'
                    !php/const PDO::MYSQL_ATTR_SSL_CERT: '%DATABASE_PRIV_KEY%'
                    !php/const PDO::MYSQL_ATTR_SSL_CA: '%DATABASE_CA_CERT%'
                    !php/const PDO::MYSQL_ATTR_SSL_VERIFY_SERVER_CERT: false
            postgres:
                server_version:    '15'
                dbname:            'mr_dev'
                host:              'postgres'
                port:              '5432'
                user:              '%env(DATABASE_USER)%'
                password:          '%env(DATABASE_PASSWORD)%'
                driver:            'pdo_pgsql'
                charset:            UTF8
    orm:
        default_entity_manager: mariadb
        entity_managers:
            mariadb:
                connection: mariadb
                naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
                auto_mapping: true
                mappings:
                    App:
                        is_bundle: false
                        type: annotation
                        dir: '%kernel.project_dir%/src/Entity'
                        prefix: 'App\Entity'
                        alias: App
                dql:
                    numeric_functions:
                        rand: DoctrineExtensions\Query\Mysql\Rand
            postgres:
                connection: postgres
                naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
                mappings:
                    App:
                        is_bundle: false
                        type: annotation
                        dir: '%kernel.project_dir%/src/Entity'
                        prefix: 'App\Entity'
                        alias: App

and doctrine_migrations.yaml

doctrine_migrations:
    em: 'mariadb'
    migrations_paths:
        'DoctrineMigrations': '%kernel.project_dir%/migrations'
    enable_profiler: '%kernel.debug%'

Then I access like this:

use Doctrine\Persistence\ManagerRegistry;

ManagerRegistry $doctrine

$users = $doctrine->getRepository(User::class, 'mariadb')->findAll();
        dump($users);

error

Class 'App\Controller\home\User' does not exist

it is looking at the wrong folder; my entity is in App\src\Entity\User.php

source https://stackoverflow.com/questions/76793052/doctrine-orm-multiple-databases-user-entity-class-not-found