What they said.. - Your authentication problems are not unique to you; - The effort of implementing standards (whether it's front end like OAuth, OIDC, or SAM

What they said.. - Your authentication problems are not unique to you; - The effort of implementing standards (whether it's front end like OAuth, OIDC, or SAML or back end like hashing) is a pain in the butt and easy to make bad choices; - If your project is successful or as your requirements change over time, now you have to figure out how to add MFA, password resets, internationalization, address security audits, etc, etc. Doing it yourself means you have 100% responsibility for everything when that is probably not your main skillset or really what you want to spend your time doing anyway. Disclosure: I work for one of the companies mentioned in this thread.