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

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I want to throw custom error here :
Incase the user enters wrong number 
which api to override in node js

by throw you mean you want to send a 400 error to the frontend? Or just change the message in the above response to something else?>

both
Actually I have my own exception handler method

right, so then override the createCodePOST API

and do your check for phone number there, and throw a JS error or somehting which is propagated to your own error handler

I added a console log but not printing anything even before create code function is called , it fails

it must run before createCode 
api : auth/signinup/code

how have you added this? Show me the full recipe init

message

tried overriding signinUp aswell , but it not even entering that

are you sure this config is being loaded?

i think the issue is with how you have written the functions

yes rest everything is working fine 
I have overriden other methods too

it should be:

```
override: {
            apis: (originalImplementation) => {
              return {
                ...originalImplementation,
                signInUpPOST: async (...) => {...},
                consumeCodePOST: async (...) => {...},
                
              };
            },
```

not the way you have where you have done `async signInUpPOST(..) {..}`

the error of validating phone number is returned even before the createCode method is called 
If I know that method then it can be overridden

as i said.. the override should be called. Please see our docs for how to override it

i didnt realise you had provided an impl for this method too