SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

Is there any way to add object to the response after signInPost

Yes. There is. You can follow this guide: https://supertokens.com/docs/thirdpartyemailpassword/advanced-customizations/apis-override/custom-response/api-override

At the end, instead of doing `return originalImplementation.signInPOST(input);`, you should do `return resp;`

input.options.res.sendJSONResponse does this set the teacher values ?

i mean it should send the reponse with whatever JSON object you give it