Further reduce user_ops line length in preparation for monaco

solvable/src/webservice/user_ops.py

@@ -13,7 +13,10 @@ class UserOps:
         self.password = password
         self.db_session = db_session
         self.message_sender = MessageSender()
-        self.log = partial(self.message_sender.send, 'Authenticator')
+        self.log = partial(
+            self.message_sender.send,
+            'Authenticator'
+        )
 
     def authenticate(self):
         """
@@ -31,7 +34,10 @@ class UserOps:
                 self.password,
                 user.passwordhash
         ):
-            self.log(f'Invalid credentials for user "{self.username}"!')
+            self.log(
+                f'Invalid credentials for '
+                f'user "{self.username}"!'
+            )
             raise InvalidCredentialsError
 
         self.log(f'User "{self.username}" logged in!')