Password SHOW/HIDE

//  ========SHOW / HIDE PASSWORD METHOD ========
  bool _showPassword = false;

  void _togglevisibility() {
    setState(() {
      _showPassword = !_showPassword;
    });
  }

// ==========PASSWORD BUTTON CODE =========
 Padding(
                          padding:
                          const EdgeInsets.fromLTRB(12.0, 8.0, 12.0, 8.0),
                          child: Material(
                            color: Colors.white.withOpacity(0.5),
                            borderRadius: BorderRadius.circular(20.0),
                            child: Padding(
                              padding: const EdgeInsets.symmetric(
                                  vertical: 0.0, horizontal: 10.0),
                              child: TextFormField(
                                controller: _passwordController,
                                obscureText: !_showPassword,
                                cursorColor: Colors.red,
                                style: TextStyle(color: Colors.white),
                                decoration: InputDecoration(
                                  hintText: "Password",
                                  border: InputBorder.none,
                                  suffixIcon: GestureDetector(
                                    onTap: () {
                                      _togglevisibility();
                                    },
                                    child: Icon(
                                      _showPassword ? Icons.visibility : Icons
                                          .visibility_off, color: Colors.red,),
                                  ),
                                ),
                              ),
                            ),
                          ),
                        ),