feat: install wizard on first launch (#1977)

* Login form loading

* add first install middleware and settings

* updates

* Login form loading

* add first install middleware and settings

* updates

* only set first install when superuser is created

* refactor first install

* only show if first install

* cleanup

* set password

* update calls

* login superuser on first install

* fix

* fixup!

* fixup!

* fixup!

* fixup!

* fixup!

* last fixup!

* fix mypy and prettier CI errors

* disable first install

* add random super user

* set first install after startup

* remove user id from form

* Update lnbits/core/views/auth_api.py

Co-authored-by: Vlad Stan <stan.v.vlad@gmail.com>

* Update lnbits/core/views/auth_api.py

Co-authored-by: Vlad Stan <stan.v.vlad@gmail.com>

* Update lnbits/middleware.py

Co-authored-by: dni ⚡ <office@dnilabs.com>

* addressing Vlad's comments

* remove super user

* move to transient settings

* fix: show `first_install` page even after a server restart

* fix: do not add `user_id` in the auth token

* fix: `make check` errors

* fix: `username` is not optional for `UpdateSuperuserPassword`

* feat: nicer error message

---------

Co-authored-by: dni ⚡ <office@dnilabs.com>
Co-authored-by: Tiago Vasconcelos <talvasconcelos@gmail.com>
Co-authored-by: Vlad Stan <stan.v.vlad@gmail.com>

lnbits/core/crud.py

@@ -151,11 +151,17 @@ async def get_account(
     user_id: str, conn: Optional[Connection] = None
 ) -> Optional[User]:
     row = await (conn or db).fetchone(
-        "SELECT id, email, username, created_at, updated_at FROM accounts WHERE id = ?",
+        """
+           SELECT id, email, username, created_at, updated_at, extra
+           FROM accounts WHERE id = ?
+        """,
         (user_id,),
     )
 
-    return User(**row) if row else None
+    user = User(**row) if row else None
+    if user and row["extra"]:
+        user.config = UserConfig(**json.loads(row["extra"]))
+    return user
 
 
 async def get_user_password(user_id: str) -> Optional[str]: