sequenceDiagram
    %% https://mermaidjs.github.io/
    participant H as Home
    participant C as Cozy-Stack
    participant K as Konnector
    participant S as External service

    H -->> C: create aggregator account if needed
    H -->> C: add aggregator account permissions for konnector
    H ->> C: create the account
    H ->> C: create folder
    H ->> C: create a reference folder->konnector
    H ->> C: create the trigger
    H ->> C: launch the konnector

    C ->> C: Ensure the konnector can write files
    C ->> K: start the konnector
    K ->> C: fetch the account
    K ->> S: login
    K -->> C: [log] login successful
    C -->> H: [ws] login successful
    K -->> C: update aggregator account
    K ->> S: fetch data
    K ->> C: save documents and files
    C -->>H: [ws] success / error