Square-authentication-helper

- add validate_and_get_payload_from_token_v0.

**Full Changelog**: https://github.com/thepmsquare/square_authentication_helper/compare/2.1.0...2.2.0

- login_username_v0 now uses post method and has new optional flag assign_app_id_if_missing that defaults to false.
- use make_request_json_output to call api endpoints.

**Full Changelog**: https://github.com/thepmsquare/square_authentication_helper/compare/2.0.0...2.1.0

add functions for
update_username_v0
update_password_v0
delete_user_v0
move data in password related endpoints to request body from params.
new optional param, app_id in register_username_v0.
generate_access_token_v0 now only needs refresh token.
logout_v0 now only needs refresh token.
update_user_app_ids_v0 now only updates ids for self (user). added access token as input param and removed user_id.
get_user_app_ids_v0 is now get_user_details_v0 with access token as the only input param.

**Full Changelog**: https://github.com/thepmsquare/square_authentication_helper/compare/1.0.0...2.0.0

- initial implementation.

**Full Changelog**: https://github.com/thepmsquare/square_authentication_helper/commits/1.0.0