🐛 Issue on subscription listing when no npub is filled

[Tirodem]

I did 4 test subscription products on 268880f commit :

• gold : https://dev-bootik2.pvh-labs.ch/product/gold-subscription
• silver : https://dev-bootik2.pvh-labs.ch/product/silver-subscription
• bronze : https://dev-bootik2.pvh-labs.ch/product/bronze-subscription
• platinum / BTC : https://dev-bootik2.pvh-labs.ch/product/platinum-btc-subscription
  I also did 4 orders with these customer's contact information :
• https://dev-bootik2.pvh-labs.ch/order/0f376afb-3586-4afa-bd03-05750f843ed0 / npub15jqgr8thxgsfnhxufcu05ucja8kgr0guu4ud82cm2h36ml6ulmns25pxvw
• https://dev-bootik2.pvh-labs.ch/order/2711e0f7-f7e3-4ab5-a02f-900631d6a945 / [email protected]
• https://dev-bootik2.pvh-labs.ch/order/a4c764ad-8dd5-4c05-b844-e031832fee1d / [email protected]
• https://dev-bootik2.pvh-labs.ch/order/7b205f18-d173-4e29-b466-e015d218b6c9 / [email protected]
  Here's the result on /admin/product/{id}/subscribers page :
• gold subscription
  
• silver subscription
  
• bronze subscription
  
• platinum / BTC subscription
  
  In database :
• the 4 subscriptions in 1 cart are saved with npub info
  
• then there's 3 subscriptions with no npub infos, nor emails info
  
  Feels like we don't manage subscription with no npub.
  That would explain why there's 7 (4+3) entries in database (instead of 4+3+2+1 = 10 expected) and why the 3 orders with subscriptions through emails aren't listed on silver & bronze subscription.

[ithiame]

Either email or npub are required on checkout so i think there is no more issue with npub.

I fix error when fetching userId.