Authsignal

**Breaking changes:**

`validate_challenge` function:

`success` is not returned anymore. Use `is_valid` instead.

`validate_challenge` now returns the following structure:


{
action: string,
is_valid: boolean,
state: string,
state_updated_at: iso_date_str,
user_id: uuid,
idempotency_key: uuid
}

- Fix JWT decryption issue

- Fix issue with the validate_challenge method where the `action` key was being used instead of the `actionCode` key

- Fix error that occurs if payload is omitted on the Track function

- Improve error handling

- Fix issues with dependency installation

- Fix version reference

**Breaking changes:**

-Remove `identify` function

-Rename `track_action` function to `track`

-Rename `action_code` params to `action`

-Add `validate_challenge` function

-Transform all return types to `snake_case`