You should consider to change WordPress default URL for many reasons first of all its a huge security risk, because hackers can easily know that you are using wordpress & will make attempts to hack your site, which will ultimately waste your hosting resources.
Method to Change WordPress Default Login URL ?
This can be done very easily with a light weight plugin called (wps Hide login).
- Download Plugin.
- Upload & Activate Plugin.
- After That Go to Settings >> General >> and change login url.
Tip : Always choose a unique Slug which is not easy to guess to make it more secure.