GMCP Authenticate sample password flow

gistfile1.txt

sequenceDiagram
    participant Client
    participant Server
    Client->>Server: Core.Supports.Set ["Char.Login 1", ...]
    Server->>Client: Char.Login.Default {"type": ["password-credentials"]}
    Client->>Server: Char.Login.Credentials {"character": "username", "password": "password"}
    Server->>Client: Char.Login.Result {"success": true}
    alt Error
        Server->>Client: Char.Login.Result {"success": false, "message": "Invalid credentials"}
    end
    alt Password & username not known
        Client->>Server: Char.Login.Credentials {} 
    end