Fix -wreturn-type warnings

cli.cpp

@@ -75,10 +75,7 @@ std::pair<bool, std::string> CLIHandler::user_change_pw([[maybe_unused]] const s
 
 		userDao->save(*user);
 	}
-	else
-	{
-		return {false, "User not found"};
-	}
+	return {false, "User not found"};
 }
 
 std::pair<bool, std::string> CLIHandler::user_rename([[maybe_unused]] const std::vector<std::string> &args)