wallet provider APIs / update PIN code

[ThierryThevenet]

IN PROGRESS

User changes the PIN code

If user updates his PIN code, wallet must request the wallet provider back end to update the PIN code in the user data base.

Check the flow https://swimlanes.io/u/Rt5vg-FWI

0. User requests to change PIN code
1. Wallet calls /nonce endpoint
   same as previously
2. Wallet calls the /token endpoint
   same as previously with 3 trials maximum
3. Wallet requests new PIN code
4. Wallet calls /update-pin endpoint
   with DPoP built and signed as previously

POST /update-pin HTTP/1.1
Host: wallet-provider.talao.co 
Authorization: Bearer <token>
DPoP: eyljkglkjglkjglkjkjhljkhlhh
Content-Type: 'application/x-www-form-urlencoded'

salted_pin_code = "kjhgkjhgjhg"

the salted_pin_code is the new one.

The wallet provider back end updates its user base with the new salted_pin_code.