Stop rebuilding authentication in every project

When building web apps, authentication is one of those things every project needs.

But implementing it properly is rarely quick.

Setting up OAuth providers, handling sessions, managing users and integrating billing can easily take days.

And the worst part is that many developers end up rebuilding the same system again and again.

After running into this problem multiple times, I decided to experiment with a different approach.

Instead of implementing everything manually, I built a small API that handles:

authentication

OAuth providers

user management

billing integration

The idea was to make the integration as simple as possible.

For example, adding Google login can look like this:

npm install syntro-js-client

const { Syntro } = require('syntro');

const syntro = new Syntro(process.env.SYNTRO_API_KEY);

const { redirectUrl } = await syntro.socialLogin('google');

This way developers can focus more on building their product rather than infrastructure.

I’d be really interested to hear how other developers approach authentication systems in their projects.

Do you usually build everything yourself, or do you rely on external services?

If you're curious about the project:
https://syntro.fun