Login somewhat functional

app/src/main/java/com/example/assignment/DBConnector.java

@@ -71,6 +71,7 @@ public class DBConnector extends SQLiteOpenHelper {
     }
     public String finduser(String username)
     {
+        //error somewhere in this method
         String string = null;
         String query = "Select * FROM " + TABLE_Users + " WHERE " + COLUMN_UserName + " = \"" + username + "\"";
 

app/src/main/java/com/example/assignment/MainActivity.java

@@ -49,6 +49,7 @@ public class MainActivity extends AppCompatActivity {
 
         handler.addNewUser(Name.getText().toString(), UserName.getText().toString(), Password.getText().toString());
 
+        //Error Here
        // Toast.makeText(getApplicationContext(),
          //       "registration complete\n" + handler.finduser(UserName.getText().toString()), Toast.LENGTH_LONG).show();
     }