Merge pull request #31 from jupyterhub/add-password-strength-option

Add password strength option

docs/index.rst

@@ -18,6 +18,7 @@ Indices and tables
    :caption: Contents:
 
    quickstart
+   options
 
 
 Installation

docs/options.rst

@@ -4,17 +4,19 @@ Feature Options
 Password Strength
 ----------------
 
-By default, when a user signs up through Native Authenticator there is no password strength verification. If you need this, you can add a verification for password strength by adding the following parameter to your config file:
+By default, when a user signs up through Native Authenticator there is no password strength verification. There are two methods that you can add to increase password strength: a verification for commmon passowords and a minimum length of password. 
+
+To verify if the password is not common (such as 'qwerty' or '1234'), you can add the following line to your config file:
 
 .. code-block:: python
 
-    c.Authenticator.check_password_strength = True
+    c.Authenticator.check_common_password = True
 
-The Authenticator will verify if the password has at least 8 characters and if it not a common password. The list of the common passwords it checks is available `on this link <https://github.com/danielmiessler/SecLists/blob/master/Passwords/Common-Credentials/10-million-password-list-top-10000.txt>`_ >._  
+The Authenticator will verify if the password is a common password and the user won't be able to sign up if it is. The list of the common passwords that are in our verification is available `on this link <https://github.com/danielmiessler/SecLists/blob/master/Passwords/Common-Credentials/10-million-password-list-top-10000.txt>`_ >._  
 
 
-By default the Authenticator will verify if the password is at least 8 characters long. If you, however, need something different, you can change the minimum size adding this parameter to the config file:
+You can also add a minimum password length that the user must have. To do this add the following line on the config file with an integer as a value:
 
 .. code-block:: python
 
-    c.Authenticator.password_length = 10
+    c.Authenticator.minimim_password_length = 10