ExtractClaims extracts claims from a token string.

GenerateAccessToken generates an access token for a user.

GenerateRefreshToken generates a refresh token for a user.

GenerateTokenPair generates an access token and a refresh token for a user.

InitJWT initializes the JWT package with the necessary secrets and issuer.

IsAuthorized checks if a token is valid and not expired.

ValidateAccessToken validates an access token and returns the token claims.

ValidateRefreshToken validates a refresh token and returns the token claims.