async function ValidateUserExists(username, email){
    if(!username || !email) throw new Error('Invalid number of args passed. Please pass username and email');
    let taken_valid_username = null;
    let taken_valid_email = null;
    if(username){
        taken_valid_username = await UsernameExists(username);
    }
    if(email){
        taken_valid_email = await EmailExists(email);
    }

    if(taken_valid_username) return taken_valid_username;
    if(taken_valid_email) return taken_valid_email;

    return null;
}

it('should see if a user already exists on an existent email', async ()=>{
    const test = await CreateDummyUser();
    const user = await ValidateUserExists(test.username, test.email);
    //expect user properties here
    await DestroyDummyUser(test);
})

async function ValidateUserExists(username, email){
    return ValidateUserExistsV2(username, email, UsernameExists, ValidateUserExists);
}

async function ValidateUserExistsV2(username, email, usernameExists, validateUserExists) {
    if(!username || !email) throw new Error('Invalid number of args passed. Please pass username and email');

    let taken_valid_username = null;
    let taken_valid_email = null;

    if(username){
        taken_valid_username = await usernameExists(username);
    }
    if(email){
        taken_valid_email = await emailExists(email);
    }

    if(taken_valid_username) return taken_valid_username;
    if(taken_valid_email) return taken_valid_email;

    return null;
}