Replace spwd in examples with getpass

spwd is removed in Python 3.13

examples/the_basics.py

@@ -7,10 +7,10 @@
 from __future__ import absolute_import
 from __future__ import print_function
 
+import getpass
 import hashlib
 import io
 import os
-import spwd
 
 import mitogen.core
 import mitogen.master
@@ -57,19 +57,17 @@ def streamy_download_file(context, path):
     }
 
 
-def get_password_hash(username):
+def get_password(username):
     """
-    Fetch a user's password hash.
+    Ask a user for their password.
     """
-    try:
-        h = spwd.getspnam(username)
-    except KeyError:
-        return None
+
+    password = getpass.getpass("Password:")
 
     # mitogen.core.Secret() is a Unicode subclass with a repr() that hides the
     # secret data. This keeps secret stuff out of logs. Like blobs, secrets can
     # also be serialized.
-    return mitogen.core.Secret(h)
+    return mitogen.core.Secret(password)
 
 
 def md5sum(path):