feat: usermanager (#2139)

* feat: usermanager

---------

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

lnbits/core/__init__.py

@@ -12,6 +12,7 @@ from .views.node_api import node_router, public_node_router, super_node_router
 from .views.payment_api import payment_router
 from .views.public_api import public_router
 from .views.tinyurl_api import tinyurl_router
+from .views.user_api import users_router
 from .views.wallet_api import wallet_router
 from .views.webpush_api import webpush_router
 from .views.websocket_api import websocket_router
@@ -36,3 +37,4 @@ def init_core_routers(app: FastAPI):
     app.include_router(websocket_router)
     app.include_router(tinyurl_router)
     app.include_router(webpush_router)
+    app.include_router(users_router)