fix: teams type

src/Session.tsx

@@ -30,7 +30,7 @@ export function SessionProvider(props: SessionProviderProps) {
   const { children } = props;
 
   const [user, setUser] = useState<User | null>(null);
-  const [teams, setTeams] = useState<Team[]>();
+  const [teams, setTeams] = useState<Team[] | null>(null);
   const [err, setErr] = useState<unknown>(null);
   const [loading, setLoading] = useState(false);