To determine if it's the user's first ever session on the frontend after they have signed in with an OIDC method, you can follow these steps: 1. First, ensure that you have configured the "session" hook for OIDC registration. This is crucial for creating a session immediately after OIDC sign-in. You can do this in your configuration file as shown in the [Ory Kratos documentation](https://www.ory.sh/docs/kratos/self-service/flows/user-registration#successful-registration):

yaml selfservice:   flows:     registration:       after:         oidc:           hooks:             - hook: session

2. After the user signs in, use the Ory SDK to check the session information. You can do this by calling the

toSession()

method, which will return the session data if the user is authenticated. Here's an example using React:

javascript import { Configuration, FrontendApi } from "@ory/client"  const ory = new FrontendApi(   new Configuration({     basePath: "YOUR_ORY_PROJECT_URL",     baseOptions: {       withCredentials: true,     },   }) )  ory.toSession()   .then(({ data: session }) => {     // Check if this is the user's first session     if (session.authenticated_at === session.issued_at) {       console.log("This is the user's first session")     } else {       console.log("This is not the user's first session")     }   })   .catch((error) => {     // Handle error (e.g., user is not authenticated)   })

In this code, we compare the

authenticated_at

and

issued_at

timestamps of the session. If they are the same, it indicates that this is the user's first session after authentication [Ory Session Management](https://www.ory.sh/docs/kratos/session-management/overview#using-ory-session-cookie). Remember to replace

"YOUR_ORY_PROJECT_URL"

with your actual Ory project URL. This approach allows you to determine if it's the user's first ever session specifically after OIDC sign-in, as requested in your question.

You're right, and I apologize for the confusion in my previous answer. You are correct that comparing

authenticated_at

and

issued_at

times is not a reliable method to determine if it's the user's first ever session. Let me provide a more accurate explanation. After reviewing the provided knowledge sources, I realize that there isn't a straightforward way to determine if it's the user's first ever session solely based on the session information available in Ory Kratos. The session object, as shown in the [Ory Session documentation](https://www.ory.sh/docs/kratos/session-management/overview#ory-session), doesn't contain any specific field that indicates whether it's the user's first session or not. The

authenticated_at

and

issued_at

times can indeed be the same for any new session, not just the first one. To accurately determine if it's the user's first ever session after OIDC sign-in, you would need to implement a custom solution. Here are a couple of potential approaches: 1. Store a flag in the user's identity metadata when they first sign up, and check this flag after each authentication. 2. Use the Ory Admin API to check the user's login history or creation date, if such information is available. However, these approaches are not directly supported by the standard Ory Kratos features based on the information provided in the knowledge sources. If determining the first session is crucial for your application, you might need to implement a custom solution or reach out to Ory support for more specific guidance on how to achieve this with their platform. I apologize again for the incorrect information in my previous response. Thank you for pointing this out, as it helps in providing more accurate information.