My admin panel throws an “Authentication failure” every time I try to sign in, so I cannot reach the backend at all. The crash happens consistently at the login attempt, but the rest of the site loads fine. I need a Laravel specialist to trace the root cause—whether it sits in middleware, guards, session handling, or an overlooked config key—and restore normal authentication flow. You’ll receive quick access to the repository, the `.env`, and the relevant database tables. Once the fix is in place, I expect: • clean, repeatable login without errors • a clear note of what was changed (routes, controller, model, environment, etc.) • one-line instructions for any migrations or cache clears I must run in production Feel free to use Tinker, Telescope, or any debugging package you prefer; I simply need the error eliminated and the solution documented so it survives future deployments.