Pop Up Alert

In this UI design, i made it look abit cool, cause i look cool colors why? because its chills down the nerves inside me, and besides that i used a tiny cute round edged curves for the tiny white square right there to make it it look comfortable in the eye of the users, besides that, i made a little light blue shades behind it to let the user focus on the alert message in the middle, and as you can see i circled the login button instead of the register button because if the user is a frequent user, he could login immediately.