Adds trim() in input data login.

ui/src/main/java/com/wireguard/android/activity/LoginActivity.java

@@ -47,8 +47,8 @@ public class LoginActivity extends AppCompatActivity {
 
     private void login() {
         HashMap<String,String> data = new HashMap<>();
-        final String username = userName.getText().toString();
-        final String inputPassword = password.getText().toString();
+        final String username = userName.getText().toString().trim();
+        final String inputPassword = password.getText().toString().trim();
         data.put("username",username);
         data.put("password",inputPassword);
         loginViewModel.login(data,this).observe(this, new Observer<StatusResource<User>>() {