authentification with jsf and postgresql - postgresql

Question

i try to do authentification with jsf and postgres database.
my class conect.java
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
#ManagedBean
#SessionScoped
public class connect {
private boolean connected;
private String pass;
private String user;
private String message;
public boolean isConnected() {
return connected;
}
public void setConnected(boolean connected) {
this.connected = connected;
}
public String getPass() {
return pass;
}
public void setPass(String pass) {
this.pass = pass;
}
public String getUser() {
return user;
}
public void setUser(String user) {
this.user = user;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String check()
{
Connection c = null;
Statement stmt = null;
try {
c = DriverManager
.getConnection("jdbc:postgresql://localhost:5432/login", "postgres", "1234");
c.setAutoCommit(false);
System.out.println("Opened database successfully");
stmt = c.createStatement();
ResultSet rs = stmt.executeQuery( "SELECT * FROM users;" );
while ( rs.next() ) {
int iduser = rs.getInt("iduser");
String username = rs.getString("username");
String password = rs.getString("password");
System.out.println( "ID = " + iduser );
System.out.println( "USERNAME = " + username );
System.out.println( "PASSWORD = " + password );
if(user.equals(username) &&(pass.equals(password))){
message="admin";
}
else message="error";
}
rs.close();
stmt.close();
c.close();
} catch ( Exception e ) {
System.err.println( e.getClass().getName()+": "+ e.getMessage() );
}
System.out.println("Operation done successfully");
return message;
}
public connect() {
}
public static void main( String args[] ){
connect c= new connect();
c.check();
}
}
The program recovers well information from the database, the problem is that this program takes into account just the latest username and password of the "users" table. Can someone tell me where is the problem