Fixed memory allocation bug in 'create_user_list' function

main.c

@@ -131,6 +131,10 @@ User** create_user_list(char* filename) {
         char* token = malloc(sizeof(char) * 30);
         User** users = malloc (num_users * sizeof(User*));
 
+	for (int i=0;i<num_users;i++) {
+		(*(users+i)) = malloc(sizeof(User));
+	}
+
         token = strtok(file_str," \r\n");
         for (int i=0;i<num_users;i++) {
 		(*(users + i))->username = strdup(token);