Unknown column in where clause in C# app

I am trying to develop C# app where I want to have login form connected to remote server. I connected to the server but when I try to login, the line : MySqlDataReader reader = cmd.ExecuteReader(); is giving me an error: Unknown column "admin" in `where clause` Do you have any idea from where can come the problem? Here is my code: ``` using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using MySql.Data.MySqlClient; namespace ECBSRecruitmentAgencySoftware { public partial class LogIn : Form { public LogIn() { InitializeComponent(); } public bool tryLogin(string username , string password) { MySqlConnection con = new MySqlConnection("host=aaaaaaaa.baaadsg;user=saaaaaak;password=2333333336;database=soaaaaaaaa2;"); MySqlCommand cmd = new MySqlCommand("Select * FROM niki WHERE user_name = `" + username + "` AND user_password = `" + password + "`;"); cmd.Connection = con; con.Open(); MySqlDataReader reader = cmd.ExecuteReader(); if (reader.Read() != false) { if (reader.IsDBNull(0) == true) { cmd.Connection.Close(); reader.Dispose(); cmd.Dispose(); return false; } else { cmd.Connection.Close(); reader.Dispose(); cmd.Dispose(); return true; } } else { return false; } } private void button1_Click(object sender, EventArgs e) { if (tryLogin(user.Text, pass.Text) == true) { MainScreen F2 = new MainScreen(); F2.Show(); this.Hide(); } else MessageBox.Show("Wrong details!"); } } } ```