Existing user sign up flow error needs to be more explicit

Author: angelotcCreated Jul 29, 2025Updated Oct 1, 2025

The error in frontend\app(login)\actions.ts needs to be fixed from

  if (existingUser.length > 0) {
    return {
      error: 'Failed to create user. Please try again.',
      email,
      password
    };
  }

to

  error: 'Account already exists',