fix that match_kid allways return None

[krakozybra]

Hello ! I worked with auth using jwk client. I ran get_signing_key_from_jwt method to check token. I faced with error jwt.exceptions.PyJWKClientError: Unable to find a signing key that matches: "1399593380". I checked api from where i got jwks.json. And this kid was there. i began debugging process. As result i found that match_kid method return None every time. After a short time and several prints i found that key_id was int, but in type hints was string. The problem was that python couldn't compare sting and int correctly. I fix it using type conversion to string. And it works ! And i fix type hint for kid_id, too. I got it php service and library for jwt. As i understood kid could be as string as int, depending on implementation for different languages and libraries. Thanks

here is example of my keys

"keys": [
    {
        "alg": "ES256",
        "crv": "P-256",
        "kid": 1399593380,
        "kty": "EC",
        "use": "sig",
        "x": "N_GHdF-7ExmKs-HgldA3LcDpTMjBHQSp9zUwyRhHyeYsaf",
        "y": "zFt09hBgGv0uRWerpGZSMPrYHhyAZMr5z3QgzJCasfKy2k"
    },
]

[Copilot]

Pull Request Overview

Fixes a bug where JWT key matching fails when the key ID (kid) is provided as an integer in the JWK instead of a string. The issue prevented successful JWT signature verification when the JWK provider returns numeric key IDs.

• Converts key ID to string during comparison to handle both string and integer key IDs
• Updates type hint for key_id property to reflect that it can be an integer

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
jwt/jwks_client.py	Converts key_id to string in comparison to handle numeric key IDs
jwt/api_jwk.py	Updates type hint for key_id property to indicate it can be an integer

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[Copilot]

The docstring annotation :rtype: str or None is inconsistent with the updated type hint int | None. It should be updated to :rtype: int or None or better yet :rtype: int | str | None to reflect that the kid can be either type in practice.

Suggested change

	:rtype: str or None
	:rtype: int or None

[krakozybra]

token was got from php library https://github.com/web-token/jwt-framework