Verify the signature of the JWT token in this method. This method depends
   * on the public key that was established during init based upon the
   * provisioned public key. Override this method in subclasses in order to
   * customize the signature verification behavior.
Verify the signature of the JWT token in this method. This method depends
   * on the public key that was established during init based upon the
   * provisioned public key. Override this method in subclasses in order to
   * customize the signature verification behavior. | JWTRedirectAuthenticationHandler.java