Safe access for nested key values in a Hash - dig method

If you are using Ruby `2.3.0` or above

Now instead of doing this:

```ruby
result.try(:[], 'avatar').try(:[], 'model').try(:[], 'raw_attributes').try(:[], 'signup_state')
# or
result && result['avatar'] && result['avatar']['model'] && result['avatar']['model']['raw_attributes'] && result['avatar']['model']['raw_attributes']['signup_state']
```

Now you can easily do the same with `dig`:

```ruby
result.dig('avatar', 'model', 'raw_attributes', 'signup_state')
```

heriberto-perez
April 28, 2021