Hi,
I have checked your project description I can do it very well, I have 7 years of experience in PHP ,MYSQL & I can add a simple login/register system in your unity app .
My key skills:
Programming,Software development ,Unity App development ,Web development, 3D Website development, Software development, Application development, Web designing, Word press, Website Hosting’s, SSL, HTML, XML, PHP, ASP, .Net, CSS, Java, JavaScript etc.
I am highly expert in Web programming, I have done a lot of projects with website development with a best quality and designed sites, You can also check my previous work.
You can Message me for more discuss about your project .
Thanks