Create super user account if it does not exist (#1688)

* fix: temp create account for `super_user_id` if missing

* chore: remove dumb import

* refactor: move logic outside `crud`

* feat: add uuid4 conversion

* fix: require valid string in .env file

* fix: update the `settings.super_user` value in case or normalisation for UUID4

* fix: allow long super_user

* chore: code format

* fix: add UI redirect with the normalized user

* fix: normalize `super_user` up one level

* fix: should normalize user in non-ui mode also

lnbits/core/crud.py

@@ -2,7 +2,7 @@ import datetime
 import json
 from typing import Any, Dict, List, Optional
 from urllib.parse import urlparse
-from uuid import uuid4
+from uuid import UUID, uuid4
 
 import shortuuid
 
@@ -18,8 +18,15 @@ from .models import BalanceCheck, Payment, PaymentFilters, TinyURL, User, Wallet
 # --------
 
 
-async def create_account(conn: Optional[Connection] = None) -> User:
-    user_id = uuid4().hex
+async def create_account(
+    conn: Optional[Connection] = None, user_id: Optional[str] = None
+) -> User:
+    if user_id:
+        user_uuid4 = UUID(hex=user_id, version=4)
+        assert user_uuid4.hex == user_id, "User ID is not valid UUID4 hex string"
+    else:
+        user_id = uuid4().hex
+
     await (conn or db).execute("INSERT INTO accounts (id) VALUES (?)", (user_id,))
 
     new_account = await get_account(user_id=user_id, conn=conn)