select sign( payload := '{"sub":"1234567890","name":"John Doe","iat":1516239022}', secret := 'secret', algorithm := 'HS256' ); select verify( token := 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJuYW1lIjoiRm9vIn0.Q8hKjuadCEhnCPuqIj9bfLhTh_9QSxshTRsA5Aq4IuM', secret := 'secret', algorithm := 'HS256' );