Docs: Update TurboVote (move-coop#376)

* Update docs.

* Fix class import.

* Remove incorrect docs.

docs/turbovote.rst

@@ -1,7 +1,41 @@
 TurboVote
 =========
 
-`TurboVote <https://turbovote.org/>`_ is an online registration tool used by progressive organizations.
+`TurboVote <https://turbovote.org/>`_ is an online voter registration and vote by mail
+tool. This class contains a single method which allows you to export your users
+(aka signups).
 
-.. autoclass :: parsons.turbovote.turbovote.TurboVote
+.. note::
+  Authentication
+    TurboVote requires `HTTP Basic Auth <https://en.wikipedia.org/wiki/Basic_access_authentication>`_.
+    Clients with a TurboVote account must pass their subdomain, username, and password.
+
+**********
+QuickStart
+**********
+
+To instantiate the TurboVote class, you can either store your TurboVote API
+username, password, subdomain as environmental variables (``TURBOVOTE_USERNAME``,
+``TURBOVOTE_PASSWORD``, and ``TURBOVOTE_SUBDOMAIN``, respectively) or pass them 
+in as arguments:
+
+.. code-block:: python
+
+   from parsons import TurboVote
+
+   # First approach: Pass credentials via environmental variables.
+   tv = TurboVote()
+
+   # Second approach: Pass credentials as arguments.
+   tv = TurboVote(username='me', password='pass', subdomain='myorg')
+
+You can then call the method:
+
+.. code-block:: python
+
+	# Get users
+	tv.get_users()
+
+
+.. autoclass :: parsons.TurboVote
    :inherited-members:

parsons/turbovote/turbovote.py

@@ -18,12 +18,10 @@ class TurboVote(object):
             env variable set.
         password: str
             A valid turbovote password. Not required if ``TURBOVOTE_PASSWORD``
-            env variable set
+            env variable set.
         subdomain: str
             Your turbovote subdomain (i.e. ``https://MYORG.turbovote.org``). Not
             required if ``TURBOVOTE_SUBDOMAIN`` env variable set.
-        uri: str
-            Base turbovote API url
     `Returns:`
         class
     """
@@ -39,18 +37,12 @@ def _get_token(self):
         # Retrieve a temporary bearer token to access API
 
         url = self.uri + 'login'
-
         payload = {'username': self.username,
                    'password': self.password}
-
-        logger.info('Generating token...')
         r = requests.post(url, data=payload)
         logger.debug(r.url)
-
         r.raise_for_status()
 
-        logger.info('Token generated.')
-
         return r.json()['id-token']
 
     def get_users(self):
@@ -65,8 +57,6 @@ def get_users(self):
         url = self.uri + f'partners/{self.subdomain}.turbovote.org/users'
 
         headers = {"Authorization": f"Bearer {self._get_token()}"}
-
-        logger.info('Requesting users table...')
         r = requests.get(url, headers=headers)
         logger.debug(r)
         r.raise_for_status()