added update user change user and change password

src/main.c

@@ -2,7 +2,6 @@
 #include <sqlite3.h>
 #include "database.h"
 #include "route.h"
-#include "sql.h"
 #include "user.h"
 
 static void root_handler(struct mg_connection *c, struct mg_http_message *hm) {
@@ -18,7 +17,7 @@ static const struct route routes[] = {
     {"POST", "/api/users/user", get_user},
     {"POST", "/api/users/delete", delete_user},
     {"POST", "/api/users/password", change_password},
-    {"POST", "/api/users/change", change_password},
+    {"POST", "/api/users/change", change_user},
     {"POST", "/api/users/add", add_user},
     {"POST", "/api/register", register_user},
     {nullptr, nullptr, nullptr}};