Pass more data to session in Next-auth

Question

We are doing OTP auth in our website. So in order to get authorized, a visitor enter his phone number in input and we send him a OPT number and he again enters the sent opt, then if it matches, we send him his account credendials (token, userID) if exists or we create new and we want to save that credentails in session useing next-auth.

This is where i got so far:

export default NextAuth({
  providers: [
    CredentialsProvider({
      credentials: {
        phoneNumber: { label: 'PhoneNumber', type: 'text' },
        code: { label: 'Code', type: 'text' },
        type: { label: 'Type', type: 'text' },
      },
      async authorize(credentials, req) {
        const user_needs = await requests.auth.signInEnterOtp(
          credentials.phoneNumber,
          credentials.code,
          credentials.type
        )
        return user_needs.ok ? true : null
      },
    }),
  ],
  callbacks: {
    async session({ session, user, token }) {
      return session
    },
  },
  secret: process.env.JWT_SECRET,
})

I need to save the user_needs in session but how can i pass it throuh authorize to session?

I tried returning the user_need in authorize but it was not passed to session callback.