Take the pain to learn user authentication before you use an external provider

External user authentication is not as simple, secure and cheap as it seems. These are the lessons I learned while implementing user authentication and authorization for my startup Afterword.

Most startups nowadays rely on external user authentication services called "Identity as a Service" (IDaaS) or "Authentication as a Service" (AuthaaS). Even big companies like OpenAI use auth0. Firebase by Google is also really popular. While I guess it makes sense in the world of “move fast and …

authentication authorization called external idaas identity learn security service services simple startup startups webdev