Finish remove user implementation

session_manager.cpp

@@ -67,3 +67,8 @@ void session_manager::create_user(std::string username, std::string password, bo
   this->con->write_string(password);
   this->con->write_string(admin?"t":"f");
 }
+
+void session_manager::remove_user(std::string username){
+  this->con->write_string("rusr");
+  this->con->write_string(username);
+}