added basic functionality

app/utils.py

@@ -1,6 +1,6 @@
 import os
 
-from flask import Flask, request
+from flask import Flask, request, session
 from typing import cast
 from itsdangerous import BadSignature, URLSafeSerializer
 from xkcdpass import xkcd_password
@@ -28,6 +28,7 @@ def get_available_decks(app: Flask):
 def generate_username() -> str:
     return cast(str, xkcd_password.generate_xkcdpassword(wordlist=words, numwords=3, delimiter="-"))
 
+
 def generate_password() -> str:
     return cast(str, xkcd_password.generate_xkcdpassword(wordlist=words, numwords=5, delimiter="-"))
 
@@ -60,6 +61,10 @@ def get_token() -> (Token | None):
     except BadSignature:
         return None
 
+def retrieve_token(username : str):
+    return db.session.execute(db.select(Token).filter_by(name=username)).scalar_one_or_none()
+
+
 def get_unlocked_decks(token: (Token|None)):
     if token is None:
         return []