SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

Since SuperTokens does not offer a C# SDK, then how can I implement a social login from scratch using C# (Xamarin)? It is not obvious in the documentation

hey <@434214131122438144> you can spin up a node server with our supertokens-node backend sdk, and this would then expose the login methods to your frontend.

Post login, the session would contain a JWT which you can send to the c# backend and verify it there using the jwks endpoint exposed by the node backend.

Well, you can make direct API calls to the core from your c# code. Here is the API spec: https://app.swaggerhub.com/apis/supertokens/CDI

but it would involve a bit of work on your end to do the code exhange from the social login provider

In my case I don't have a budget to host a backend

i see. Im afraid that you will require a backend for this for sure. You can try using aws lambda. It's very cheap and works.

What do you mean budget <@434214131122438144> you can host the node server for basically free

Email and password login, meanwhile, should be as simple as in that API template right?

> Email and password login, meanwhile, should be as simple as in that API template right?
Yes.

You can get the tiniest machine and it'll either be free or 1$ a month

https://aws.amazon.com/free/?all-free-tier.sort-by=item.additionalFields.SortRank&all-free-tier.sort-order=asc&awsf.Free%20Tier%20Types=*all&awsf.Free%20Tier%20Categories=*all

First 12 moths free ec2, and lamba is always free up to 1 million requests per month

750h of ec2 per month for the first 12 moths on several types of machines