prolab-api/common/config/main-local.php

<?php
return [
    'components' => [
        'db' => [
            'class' => 'yii\db\Connection',
            'dsn' => 'sqlsrv:Server=192.168.0.101;Database=prolab_api',
            'username' => 'sa',
            'password' => '',
            'charset' => 'utf8',
        ],

        'prolab' => [
            'class' => 'yii\db\Connection',
            'dsn' => 'sqlsrv:Server=192.168.0.101;Database=DB_PL',
            'username' => 'sa',
            'password' => '',
            'charset' => 'utf8',
        ],

        'patho' => [
            'class' => \yii\db\Connection::class,
            'dsn' => 'mysql:host=172.16.0.7;dbname=prolab_main', //161.82.188.168
            'username' => 'apiuser',
            'password' => 'Aa157344121165',
            'charset' => 'utf8',
        ],

        'mailer' => [
            'class' => 'yii\swiftmailer\Mailer',
            'viewPath' => '@common/mail',
            // send all mails to a file by default. You have to set
            // 'useFileTransport' to false and configure a transport
            // for the mailer to send real emails.
            'useFileTransport' => true,
        ],
    ],
];