NewJWTClient creates a new JWT client with the given options.

DefaultAccessTTL is the default access token TTL (Time-To-Live) in seconds.

DefaultRefreshTTL is the default refresh token TTL (Time-To-Live) in seconds.

JWTClient represents a JWT client which can be used to perform actions on JWT tokens.

JWTOptions represents options for setting up the JWT client.

Token represent a JWT token with its expiration time and issued time.

TokenPair represents a JWT token pair (access and refresh tokens) used for authentication.