fix(services): 🐛 types on return value

src/services/jwt.service.ts

@@ -8,10 +8,10 @@ const logger = new Logger({ name: "JwtService" });
  *
  * @param {string | Uint8Array} jwt
  *    - The JWT token to verify.
- * @returns {Promise<null | object>}
+ * @returns {Promise<null | JWTPayload>}
  *    - The payload of the verified JWT token or null if verification fails.
  */
-async function JwtVerifyService(jwt: string | Uint8Array): Promise<null | object> {
+async function JwtVerifyService(jwt: string | Uint8Array): Promise<null | JWTPayload> {
  try {
   const result = await Jose.jwtVerify(
     jwt,