Cannot create a new user using command with magento-cloud-docker

[XiaoYiyichonga]

 - Summary of the issue
 -      After successfully set up the magento-cloud-docker at my own Mac os, I cannot create a new user using the provide command from Adobe website.
 - Information on your environment:
 -      Mac os,
 -      Installed Magento-cloud-docker
 - Steps to reproduce,
 -      1. magento-cloud-docker was successfully setup and we can access is with "http://magento2.docker/"
 -      2. I want to create a new user based on the following command.
 -         ```
           php bin/magento admin:user:create --admin-user="xxx" --admin-password="xxx" --admin- email="xxxx" --admin-firstname="xxxi" --admin-lastname="xxx"
           ````
 - Expected and actual results,
   The expected result is this command was successfully run and a new user was created.
   actual result is I met a error as below
  "In Installer.php line 1136:
   Can't run this operation: configuration for DB connection is absent."

[BaDos]

@XiaoYiyichonga Hi,

Do you run this command inside the deploy container?
The build container does not have access to the DB.