It is always important to visualize, plan and document from the beginning the product that one is creating. Couple of weeks after the start, the mind map with the options of the product was created (https://hipstapas.dev/images/PasswordAsAService_MindMap_Features.png).
A product that serves sensitive information, must gain the trust of the users. This is how the product vision - TRUST - was born:
🔹Transparent (open source)
🔹Reliable (hosted in the cloud)
🔹User-friendly (0 configuration and it just works)
🔹Secure (no analytics, no cookies)
🔹Trustworthy (certified by the crowd)
All this helped enormously the implementation.