code: def create_user(tracking_uri):
      username = random_str()
      password = random_str()
      response = _send_rest_tracking_post_request(
          tracking_uri,
          "/api/2.0/mlflow/users/create",
          {
              "username": username,
              "password": password,
          },
          auth=(ADMIN_USERNAME, ADMIN_PASSWORD),
      )
      response.raise_for_status()
      return username, password
  
file_path: mlflow/tests/server/auth/auth_test_utils.py
imports: from mlflow.environment_variables import MLFLOW_TRACKING_PASSWORD, MLFLOW_TRACKING_USERNAME
  from mlflow.server.auth import auth_config
  from tests.helper_functions import random_str
  from tests.tracking.integration_test_utils import _send_rest_tracking_post_request
label_desc: Use image node_id 1 for calling a global function with example usage: create_user(tracking_uri) and returns: username,  password