btnJoin.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String username = etLogin.getText().toString();
            String password = etPassword.getText().toString();
            String url = "https://IpAdress:Port/index.php/api/user";
            AsyncHttpClient client = new AsyncHttpClient();
            client.setBasicAuth(username,password, new AuthScope("IpAdress", Port, AuthScope.ANY_REALM));

            client.get(url, new AsyncHttpResponseHandler() {
                @Override
                public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                    Toast.makeText(getApplicationContext(), "Connected", Toast.LENGTH_LONG).show();
                    Log.d("App", "Connected");

                }

                @Override
                public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
                    Log.d("App","Upload Failed!");
                    Log.d("App","Error Message: " + error.getMessage());
                    Log.d("App", "Error Cause: " + error.getCause());
                }
            });
        }
    });