Code to generate a new signing key (to sign access tokens): [function at line 17]: https://github.com/supertokens/supertokens-node-mysql-ref-jwt/blob/v4.3.0/lib/ts/helpers/utils.ts Code to create and verify JWT access token given a signing key and JWT payload: https://github.com/supertokens/supertokens-node-mysql-ref-jwt/blob/v4.3.0/lib/ts/helpers/jwt.ts Code to encrypt and decrypt refresh tokens: [function at line 52 and line 92]: https://github.com/supertokens/supertokens-node-mysql-ref-jwt/blob/v4.3.0/lib/ts/helpers/utils.ts I hope this helps.