Finish remove user implementation

msql_acces.cpp

@@ -97,3 +97,10 @@ void msql_acces::create_user(std::string user, std::string pass, bool admin){
   pstmt->setBoolean(3,admin);
   sql::ResultSet *res = pstmt->executeQuery();
 }
+
+void msql_acces::remove_user(std::string user){
+  sql::PreparedStatement *pstmt =
+      con->prepareStatement("delete from users where username=?");
+  pstmt->setString(1,user);
+  pstmt->executeUpdate();
+}