// Check if the username and password match with the list of users in the database
public bool SignIn()
{
bool flag = false;
DBConnect dbc = new DBConnect(); //Define a new connection to database
string role = dbc.VerifyUser(txtUserName.Text, txtPassword.Text); //sign the parameters to the method
if (role == "Not found")
{
flag = false;
}
else
{
flag = true;
userrRole = role;
}
return(flag); //return the bool result
}