Creation of authorization failed - creation on PIN

Hi, Yesterday I could nicely create PIN code through the API, today doesnt work. SmartLock is online, I can create PIN codes manually without a problem (also I can create users with API wihtout a problem), but not through the API. Please help. The only reason why I am trying to do this, is becuase there are various times, when NUKI is offline and Smoobu cannot create a User for my guests, and there are other times when Smoobu creates a user but NUKI fails to create PIN codes. Horrible horrible situations, thankfully until now i was able to identify this problems and no guest has stayed stranded in front of the door.