Reconnect to DB for every auth request

Some error with pymysql (perhaps?) causes poddery.com
to only accept 1 or 2 auth requests before failing.
This should fix that. (probably)

diaspora_auth_provider.py

@@ -22,13 +22,13 @@ import bcrypt
 
 import logging
 
-__VERSION__ = "0.0.5"
+__VERSION__ = "0.0.6"
 
 logger = logging.getLogger(__name__)
 
 
 class DiasporaAuthProvider:
-    __version__ = "0.0.5"
+    __version__ = "0.0.6"
 
     def __init__(self, config, account_handler):
         self.account_handler = account_handler
@@ -39,6 +39,11 @@ class DiasporaAuthProvider:
         elif self.config.engine == 'postgres':
             import psycopg2
             self.module = psycopg2
+
+    @defer.inlineCallbacks
+    def check_password(self, user_id, password):
+        if not password:
+            defer.returnValue(False)
         self.connection = self.module.connect(
             database=self.config.db_name,
             user=self.config.db_username,
@@ -47,10 +52,6 @@ class DiasporaAuthProvider:
             port=self.config.db_port
         )
 
-    @defer.inlineCallbacks
-    def check_password(self, user_id, password):
-        if not password:
-            defer.returnValue(False)
         # user_id is @localpart:hs_bare. we only need the localpart.
         local_part = user_id.split(':', 1)[0][1:]
         logger.info("Checking if user {} exists.".format(local_part))
@@ -65,6 +66,7 @@ class DiasporaAuthProvider:
                     user = yield threads.deferToThread(
                         cursor.fetchone
                     )
+                    cursor.close()
             # check if the user exists.
             if not user:
                 logger.info("User {} does not exist. Rejecting auth request".format(local_part))
@@ -95,6 +97,8 @@ class DiasporaAuthProvider:
         except self.module.Error as e:
             logger.warning("Error during diaspora authentication: {}".format(e))
             defer.returnValue(False)
+        finally:
+            self.connection.close()
 
     @staticmethod
     def parse_config(config):