Hey , i found an easy solution
1 - Go to the leaderboard .
2 - Click on " Following".
3 - Switch to all time (just look under global , u'll find it on the top right , click on it and Switch to "all time ) .
Now u can know how many people do u follow , but remember :
cout <<"\nI'm following : " << number_of_follow-1 <<endl;
number_of_follow-1 : cause u've counted on your leaderboard , so u should decrease one person from the total in order to get the correct number .
I have to say that the method by Zakaria Boudal is quite accurate although I found a difference of 2 rather than 1 between the number of people he's following when I directly counted them Vs what's on his Following leaderboard.