Post sign in callbacks

1. On the frontend

What type of UI are you using?

This method allows you to fire events immediately after a successful sign in. For example to send analytics events post sign in.

import SuperTokens from "supertokens-auth-react";
import EmailPassword from "supertokens-auth-react/recipe/emailpassword";
import Session from "supertokens-auth-react/recipe/session";

SuperTokens.init({
    appInfo: {
        apiDomain: "...",
        appName: "...",
        websiteDomain: "..."
    },
    recipeList: [
        EmailPassword.init({
            onHandleEvent: async (context) => {
                if (context.action === "SUCCESS") {
                    if (context.isNewRecipeUser && context.user.loginMethods.length === 1) {
                        // TODO: Sign up
                    } else {
                        // TODO: Sign in
                    }
                }
            }
        }),
        Session.init()
    ]
});

info

Please refer to this page to learn more about the onHandleEvent hook.

2. On the backend

For this, you'll have to override the signIn recipe function in the init function call.

import SuperTokens from "supertokens-node";
import EmailPassword from "supertokens-node/recipe/emailpassword";
import Session from "supertokens-node/recipe/session";

SuperTokens.init({
    appInfo: {
        apiDomain: "...",
        appName: "...",
        websiteDomain: "..."
    },
    supertokens: {
        connectionURI: "...",
    },
    recipeList: [
        EmailPassword.init({
            override: {
                functions: (originalImplementation) => {
                    return {
                        ...originalImplementation,
                        signIn: async function (input) {

                            // First we call the original implementation of signIn.
                            let response = await originalImplementation.signIn(input);

                            // Post sign up response, we check if it was successful
                            if (response.status === "OK") {
                                /**
                                * 
                                * response.user contains the following info:
                                * - emails
                                * - id
                                * - timeJoined
                                * - tenantIds
                                * - phone numbers
                                * - third party login info
                                * - all the login methods associated with this user.
                                * - information about if the user's email is verified or not.
                                * 
                                */

                                // TODO: post sign in logic
                            }
                            return response;
                        }
                    }
                }
            }
        }),
        Session.init({ /* ... */ })
    ]
});