Firebase authentication

[sunecko]

An example for firebase auht will be great

[agg-yash]

Thanks for raising this. I think adding a Firebase auth example would definitely be useful.

To make it more comprehensive, we could also create an auth/ directory and include multiple authentication approaches side by side, for example:

• Firebase
• JWT
• SQL/Postgres-backed auth
• Other common providers

This way, developers looking for authentication patterns in Gin could find them all in one place instead of scattered across separate examples.

What do you think about structuring it this way? I’d be happy to start by contributing one or two of these examples.