Auth sequence

This sequence diagram template models a typical sign-in handshake: the user, your app, and an identity provider exchanging OAuth requests and tokens.

It includes activation bars, a consent note, alt branches for success vs denial, and an optional remember-device step — enough structure to adapt for your auth story.

Use the template in SayDiagram, then tweak participants and messages in Preview or Arrange.

sequenceDiagram
  actor U as User
  participant A as App
  participant I as IdP
  U->>+A: Sign in
  A->>+I: OAuth request
  Note right of I: Consent screen
  I-->>U: Consent
  U->>I: Approve
  I-->>-A: Token
  alt Session ok
    A-->>U: Session
  else Denied
    A-->>U: Error
  end
  deactivate A
  opt Remember device
    A->>A: Store cookie
  end