Raise instances of exceptions for consistency

flask_discord/_http.py

@@ -81,12 +81,12 @@ class DiscordOAuth2HttpClient(abc.ABC):
     @staticmethod
     @abc.abstractmethod
     def save_authorization_token(token: dict):
-        raise NotImplementedError
+        raise NotImplementedError()
 
     @staticmethod
     @abc.abstractmethod
     def get_authorization_token() -> dict:
-        raise NotImplementedError
+        raise NotImplementedError()
 
     def _fetch_token(self, state):
         discord = self._make_session(state=state)

flask_discord/models/user.py

@@ -191,7 +191,7 @@ class User(DiscordModelsBase):
         try:
             data = {"access_token": current_app.discord.get_authorization_token()["access_token"]}
         except KeyError:
-            raise exceptions.Unauthorized
+            raise exceptions.Unauthorized()
         return self._bot_request(f"/guilds/{guild_id}/members/{self.id}", method="PUT", json=data) or dict()
 
     def fetch_guilds(self) -> list:

flask_discord/utils.py

@@ -23,7 +23,7 @@ class JSONBool(object):
             return cls(True)
         if value.lower() == "false":
             return cls(False)
-        raise ValueError
+        raise ValueError()
 
 
 def json_bool(value):
@@ -45,7 +45,7 @@ def requires_authorization(view):
     @functools.wraps(view)
     def wrapper(*args, **kwargs):
         if not current_app.discord.authorized:
-            raise exceptions.Unauthorized
+            raise exceptions.Unauthorized()
         return view(*args, **kwargs)
 
     return wrapper