Update a user

Update user information and team membership details.

Updatable fields:

• firstName - User's first name
• lastName - User's last name
• email - User's email address
• phone - User's phone number
• timezone - User's timezone (IANA format)
• role - Team role (admin, member, etc.)
• roleTypeId - Role type ID (e.g., Agent, Broker)

Note: Requires appropriate permissions to update user information.