  Here is the Python code that interacts with the OneViewClient using the hpeOneView library:
```
from hpeOneView.oneview_client import OneViewClient

# Load the configuration file
config = OneViewClient.load_config()

# Create a new scope
scope = OneViewClient.create_scope(config, "MyScope")

# Create a new user with specific permissions
user = OneViewClient.create_user(config, "MyUser", "MyPassword", ["MyRole"])

# Create multiple users with different permissions
users = OneViewClient.create_multiple_users(config, ["User1", "User2", "User3"], ["Role1", "Role2", "Role3"])

# Update the user's password
OneViewClient.update_user_password(config, user["username"], "NewPassword")

# Add a new role to an existing user
OneViewClient.add_role_to_user(config, user["username"], "NewRole")

# Update the roles of a user
OneViewClient.update_user_roles(config, user["username"], ["NewRole1", "NewRole2"])

# Remove certain roles from a user
OneViewClient.remove_roles_from_user(config, user["username"], ["Role1", "Role2"])

# Retrieve a user by their username
user = OneViewClient.get_user_by_username(config, "MyUser")

# Retrieve all users
users = OneViewClient.get_all_users(config)

# Validate if a full name or username is already in use
is_in_use = OneViewClient.is_username_in_use(config, "MyUser")

# Get the roles associated with a user
roles = OneViewClient.get_roles_for_user(config, user["username"])

# Get users by their role
users = OneViewClient.get_users_by_role(config, "MyRole")

# Delete a single user
OneViewClient.delete_user(config, user["username"])

# Delete multiple users
OneViewClient.delete_multiple_users(config, ["User1", "User2", "User3"])
```