class_docstr: CMU keystroke dataset.
  
  Users are tasked to type in a password. The task is to determine which user is typing in the
  password.
  
  The only difference with the original dataset is that the "sessionIndex" and "rep" attributes
  have been dropped.
  
  References
  ----------
  [^1]: [Keystroke Dynamics - Benchmark Data Set](http://www.cs.cmu.edu/~keystroke/)
code: def __init__(self):
      super().__init__(
          n_samples=20_400,
          n_features=31,
          n_classes=51,
          task=base.MULTI_CLF,
          url="http://www.cs.cmu.edu/~keystroke/DSL-StrongPasswordData.csv",
          size=4_669_935,
          filename="DSL-StrongPasswordData.csv",
          unpack=False,
      )
  
imports: from __future__ import annotations
  from river import stream
  from .None import base
label_desc: Use image node_id 1 to create a new Keystroke object from inherited base classes: base with example: obj = Keystroke()