Create users with policy via API

[xbreaker]

How create user and setup IAM policy via API?
Trying to use aws cli

aws iam create-user --user-name testuser

And got error:

2026-01-30 05:57:07,287 - MainThread - botocore.parsers - DEBUG - Response body:
b'<?xml version="1.0" encoding="UTF-8"?><Error><Code>NotImplemented</Code><Message>unknown service</Message></Error>'
2026-01-30 05:57:07,293 - MainThread - awscli.clidriver - DEBUG - Exception caught in main()
Traceback (most recent call last):
  File "awscli/clidriver.py", line 530, in main
  File "awscli/clidriver.py", line 667, in __call__
  File "awscli/clidriver.py", line 881, in __call__
  File "awscli/clidriver.py", line 1017, in invoke
  File "awscli/clidriver.py", line 1031, in _make_client_call
  File "awscli/botocore/client.py", line 438, in _api_call
  File "awscli/botocore/context.py", line 124, in wrapper
  File "awscli/botocore/client.py", line 907, in _make_api_call
botocore.exceptions.ClientError: An error occurred (Unknown) when calling the CreateUser operation: Unknown

What the right way for this?

[loverustfs]

You can use https://github.com/rustfs/cli.