Changing user's main domain via API without losing data - CMD_API_MODIFY_USER doesn't have domain parameter

[amoozesh98com]

Hello,

I'm trying to change a user's main domain using the DirectAdmin API, but I can't find the correct endpoint for this. The goal is to change the domain without losing any user data (files, emails, databases, etc.).

What I've tried:

1. CMD_API_MODIFY_USER - This endpoint works for changing settings like bandwidth, quota, packages, etc., but it doesn't have a "domain" parameter in the documentation. I tried adding "domain" anyway but it didn't work.

2. CMD_API_CHANGE_DOMAIN - I get this error:
"you do not own that old_domain"
Even when running as Admin.

3. CMD_API_DOMAIN with action=change - I get this error:
"Called CMD_DOMAIN or CMD_API_DOMAIN without any variables."

4. CMD_API_ACCOUNT_MODIFY - Returns HTTP 405 (Method Not Allowed)

Example of what I'm trying to do:
- User: testuser
- Current domain: olddomain.com
- New domain: newdomain.com
- All data (files, emails, databases) should remain intact

Environment:
- DirectAdmin Version: [your version]
- OS: [your OS]
- PHP: [your version]
- Account: Admin

What I've confirmed:
- The user exists and is active
- The login key has proper permissions
- Other APIs work fine (CMD_API_USER_PASSWD, CMD_API_SHOW_USER_CONFIG, etc.)
- No errors in /var/log/directadmin/error.log

My questions:

1. Is there a specific API endpoint for changing a user's main domain without losing data?
2. If CMD_API_MODIFY_USER doesn't support domain changes, what is the correct method?
3. Is there a specific parameter order or format required for CMD_API_CHANGE_DOMAIN?
4. Could there be a configuration issue on my server that prevents domain changes?

I need to change the domain while keeping all user data intact. Please guide me to the correct API endpoint and parameters.

Thank you for your help.