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.
/// The request was rejected because it attempted to create a resource that already exists.
///
/// The request was rejected because it referenced an entity that is temporarily unmodifiable,
/// such as a user name that was deleted and then recreated. The error indicates that
/// the request is likely to succeed if you try again after waiting several minutes. The
/// error message describes the entity.
///
/// The request was rejected because it attempted to create resources beyond the current
/// AWS account limits. The error message describes the limit exceeded.
///
/// The request was rejected because it referenced an entity that does not exist. The
/// error message describes the entity.
///
/// The request processing has failed because of an unknown error, exception or failure.
///
