Could someone tell me why isn't my if/else statment working?

I've tried to play with little details, and yet, doesn't seem to work properly. And I don't know why!

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char adminName[20];
    char userName[20];
    adminName[20]= "Admin";

    printf("Please, enter your name:");
    scanf("%s", userName);

    if(userName == adminName) {
        printf("Welcome, Admin! \n");
    }

    printf("Wrong log-in details, %s. \n", userName);
    return 0;
}