public async Task <string> AdminSignUp(string username, string password, string phone)
{
if (username == null)
{
return("username cannot be null");
}
if (await usersDAL.AddDataUser(new RegisteredAdmin(username, EncryptString(key, password), phone)))
{
await usersDAL.AddNewAdminState(username, EncryptString(key, password), phone);
await usersDAL.AddNewShoppingCart(username);
return("success");
}
return("username: "******" is already taken please choose a different one");
}