Try adding user to guild method [broken]

flask_discord/_http.py

@@ -33,8 +33,17 @@ class DiscordOAuth2HttpClient(abc.ABC):
         self.client_id = app.config["DISCORD_CLIENT_ID"]
         self.client_secret = app.config["DISCORD_CLIENT_SECRET"]
         self.redirect_uri = app.config["DISCORD_REDIRECT_URI"]
+        self.bot_token = app.config.get("DISCORD_BOT_TOKEN", str())
         if "http://" in self.redirect_uri:
             os.environ["OAUTHLIB_INSECURE_TRANSPORT"] = "true"
+        app.discord = self
+
+    @property
+    def bot_authorization_header(self):
+        return {
+            "Authorization": f"Bot {self.bot_token}",
+            "Content-Type": "application/json",
+        }
 
     @staticmethod
     def _token_updater(token):

flask_discord/models/user.py

@@ -2,6 +2,8 @@ from .base import DiscordModelsBase
 
 from .. import configs
 
+from flask import current_app
+
 
 class User(DiscordModelsBase):
     """Class representing Discord User.
@@ -70,6 +72,11 @@ class User(DiscordModelsBase):
         """A boolean representing if avatar of user is animated. Meaning user has GIF avatar."""
         return self.avatar_hash.startswith("a_")
 
+    def add_to_guild(self, guild_id):
+        discord = current_app.discord
+        return discord.request(
+            f"/guilds/{guild_id}/members/{self.id}", method="PUT", headers=discord.bot_authorization_header)
+
 
 class Bot(User):
     """Class representing the client user itself."""