mobilebackendgateway/config/services.php

<?php

return [
    'mobilebackend' => [
        'base_uri' => env('MOBILEBACKEND_BASE_URL'),
    ],
    'mobilebackendtest' => [
        'base_uri' => env('MOBILEBACKENDTEST_BASE_URL'),
    ],
    'wallet_service' => [
        'base_uri' => env('WALLET_SERVICE_BASE_URL'),
        'key'=> env('WALLET_SERVICE_KEY')
    ]
];