feat(api): user authentication

src/auth/jwt.strategy.ts

@@ -0,0 +1,23 @@
+import { Injectable } from "@nestjs/common";
+import { ConfigService } from "@nestjs/config";
+import { PassportStrategy } from "@nestjs/passport";
+import { Strategy, ExtractJwt } from "passport-jwt";
+import { AuthService } from "./auth.service";
+
+@Injectable()
+export class JwtStrategy extends PassportStrategy(Strategy) {
+  constructor(
+    private readonly config: ConfigService,
+    private readonly authService: AuthService
+  ) {
+    super({
+      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
+      ignoreExpiration: false,
+      secretOrKey: config.get<string>("JWT_SECRET")
+    });
+  }
+
+  async validate(payload: any) {
+    return this.authService.findUser(payload.sub);
+  }
+}