C++ function must return a value

I’m trying to make a program where I have a password in before it but it just says:

admission must return a value

And I do not understand what to do about it.

string Admission() {
  string userinput;                // users guess
  string password = "passwordlol"; // actual password

  cout << "Enter password:" << endl;
  cin >> userinput;

  if (userinput != password) {
    cout << "Wrong password, please try again" << endl;
    cin >> userinput;

    while (userinput != password)
      cout << "Wrong password, please try again" << endl;

    cin >> userinput;
  } else
    cout << "Correct password, welcome in.";
}

int main() {
  cout << Admission() << endl;
  system("pause>nu1");

>Solution :

The issue has been mentioned in the comments. I just want to correct your code a bit.

1. std::endl slows down your program because of unnecessary flushes. Use '\n' instead.
2. system("pause>nu1"); is non-portable code. Use std::cin.get() or another portable alternative.
3. Your loop is not good. Use a do-while loop instead of the if-else statement that has a while-loop inside.
4. It’s good to declare a variable close to where it will be used. We’re not coding in pre-C99!!! This also reduces your mental load of memorizing where a variable can be modified. So you won’t have to worry much.

#include <iostream>


void Admission()
{
    std::string password = "passwordlol"; // actual passaword
    std::cout << "Enter password:\n";

    bool isCorrect { };

    do
    {
        std::string userinput; // users guess
        std::cin >> userinput;

        if ( userinput != password )
        {
            std::cout << "Wrong password, please try again\n";
        }
        else
        {
            isCorrect = true;
        }

    } while ( !isCorrect );

    std::cout << "Correct password, welcome in.\n";
}

int main( )
{
    Admission( );

    std::cin.get( );
}