Can you help with the opcode?

Hello there. How can I get the character name in the c ++ project I am doing?

For example:

Code:

char* CharName = "";

Login = (int)*reinterpret_cast<bool*>(0x6102); // Check login
    if (Login == 1) {
        CharName = reinterpret_cast<char*>(0x3013);

    }

I want to ask if there is a login and get the character name when login.
Which opcode should I use? How can I do that?