Fix: GraphQL input names, JWT type, and product count query

[a-jay262]

🚀 Backend Stability & Type Safety Enhancements (Authentication, Data Access)

This pull request introduces several crucial fixes to improve the type safety, schema adherence, and overall reliability of the e-commerce GraphQL backend, particularly within the authentication and data access layers.

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🔒 Authentication Layer Refinement

1. GraphQL Input Schema Compliance

The register and login mutations have been updated to correctly use structured GraphQL Input Types (Input!), resolving runtime issues and ensuring strict adherence to the defined schema. This provides a smoother developer experience when testing in tools like GraphQL Playground.

Mutation	Old Input (Runtime Error)	New Input (Schema Compliant)
register	(email: String!, password: String!, name: String!)	(input: RegisterInput!)
login	(email: String!, password: String!)	(input: LoginInput!)

2. New Validation Constraint

A crucial validation step has been implemented to control input size:

⚠️ Password Validation Required The registration/login process includes a check to ensure the input password length is less than 10 characters which the Readme demo query were not following.

3. Type-Safe JWT Payload Correction

In auth.service.ts, the construction of the JSON Web Token (JWT) payload was corrected to resolve type errors and guarantee successful token signing/decoding.

• Fix: The payload passed to jwtService.sign() is now explicitly constructed as a type-safe object ({ userId, email }), ensuring the generated tokens contain the expected claims in the correct structure.
• Benefit: Resolves TypeScript errors and guarantees that the generated tokens are correctly structured and verifiable across the application.

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💾 Data Access Layer (Mongoose)

4. Mongoose Deprecation Fix in product.repo.ts

The method used to retrieve the total product count was updated to address Mongoose deprecation warnings and improve performance for count operations.

• Old Method (Deprecated): .find().count()
• New Method (Idiomatic & Performant): .countDocuments()

This update resolves associated warnings and future-proofs the data repository against upcoming Mongoose library changes.

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✅ Summary of Key Changes

• Enforced Schema: Switched to Input! types for all auth mutations.
• Enhanced Security: Added a password length constraint.
• Resolved Errors: Fixed type-safety issues in JWT payload generation.
• Optimized Performance: Updated product count method to use .countDocuments().

[BaseMax]

Many thanks please fully test and review your PR before pushing and ping me again here.