I have installed q2a and 4 wordpress applications with different themes in my website.
1) Q2A is installed in the main domain of my website
2) Word press is installed in 3 other subdomains of my website.
3) OSClass software is installed in one of my subdomain.
Now, if a user wants to register. He has to register 5 times in my website which is very annoying.
I want to have one signle registration form and one login for users to use the entire website.
Please help me how I'll be able to do this.
Thanking you in advance for your kind help.