Which UI do you use?

Custom UI

Pre built UI

Handle Event Hook

This function is called for various user actions. It can be used for logging, analytics or any side effect purposes (these are essentially fire and forget events).

ReactJS

// this goes in the auth route config of your frontend app (once the pre built UI script has been loaded)
supertokensUIEmailPassword.init({
    onHandleEvent: (context) => {
        if (context.action === "PASSWORD_RESET_SUCCESSFUL") {

        } else if (context.action === "RESET_PASSWORD_EMAIL_SENT") {

        } else if (context.action === "SUCCESS") {
            if (context.createdNewSession) {
                let user = context.user;
                if (context.isNewRecipeUser && context.user.loginMethods.length === 1) {
                    // sign up success
                } else {
                    // sign in success
                }
            } else {
                // this is during second factor login of step up auth flow
            }
        }
    }
})

Angular

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

EmailPassword.init({
    onHandleEvent: (context) => {
        if (context.action === "PASSWORD_RESET_SUCCESSFUL") {

        } else if (context.action === "RESET_PASSWORD_EMAIL_SENT") {

        } else if (context.action === "SUCCESS") {
            if (context.createdNewSession) {
                let user = context.user;
                if (context.isNewRecipeUser && context.user.loginMethods.length === 1) {
                    // sign up success
                } else {
                    // sign in success
                }
            } else {
                // this is during second factor login of step up auth flow
            }
        }
    }
})

Vue

// this goes in the auth route config of your frontend app (once the pre built UI script has been loaded)
supertokensUIEmailPassword.init({
    onHandleEvent: (context) => {
        if (context.action === "PASSWORD_RESET_SUCCESSFUL") {

        } else if (context.action === "RESET_PASSWORD_EMAIL_SENT") {

        } else if (context.action === "SUCCESS") {
            if (context.createdNewSession) {
                let user = context.user;
                if (context.isNewRecipeUser && context.user.loginMethods.length === 1) {
                    // sign up success
                } else {
                    // sign in success
                }
            } else {
                // this is during second factor login of step up auth flow
            }
        }
    }
})

info

Also checkout the session recipe handle event hook.