change username textfield return key

GMERemittance/Module/Login/User Interface/View/LoginViewController.swift

@@ -121,7 +121,9 @@ class LoginViewController: UIViewController {
         // all setup should be done here
         setupNavBar()
         setupColor()
+        self.userNameTextField.delegate = self
         self.passwordTextField.delegate = self
+        self.userNameTextField.returnKeyType = .next
 //        showAnimation()
     }
     
@@ -353,4 +355,12 @@ extension LoginViewController: UITextFieldDelegate {
         }
         return true
     }
+    
+    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
+        if textField == userNameTextField {
+            userNameTextField.resignFirstResponder()
+            passwordTextField.becomeFirstResponder()
+        }
+        return false
+    }
 }