Updates the name and/or the path of the specified IAM user.
You should understand the implications of changing an IAM user's path or
name. For more information, see Renaming an IAM User
and Renaming an IAM Group
in the IAM User Guide.
To change a user name, the requester must have appropriate permissions
on both the source object and the target object. For example, to change
Bob to Robert, the entity making the request must have permission on Bob
and Robert, or must have permission on all (*). For more information
about permissions, see Permissions and Policies.