Implementar modulo de Auth

backend/src/modules/auth/auth.service.ts

@@ -0,0 +1,51 @@
+import bcrypt from "bcrypt";
+import jwt from "jsonwebtoken";
+import userModel from "../user/user.model";
+
+export class AuthService {
+
+    async login (
+        userName:string,
+        password:string
+    ){
+        const user =
+        await userModel.findOne({
+            userName
+        });
+
+        if (!user) {
+            throw new Error("Usuario no encontrado");
+        }
+
+        const validPassword =
+        await bcrypt.compare(
+            password,
+            user.passwordHash
+        );
+
+        if (!validPassword){
+            throw new Error("Contraseña incorrecta");
+        }
+
+        user.lastLogin = new Date();
+        await user.save();
+
+        const token = jwt.sign(
+            {
+
+                id:user._id,
+                roleId: user.roleId
+            },
+
+            process.env.JWT_SECRET as string,
+            {
+                expiresIn:"8h"
+            }
+        );
+
+        return {
+            token,
+            user
+        };
+    }
+}