Twilio

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**Api**
- Add new Balance resource:
- url: '/v1/Accounts/{account sid}/Balance'
- supported methods: GET
- returns the balance of the account

**Proxy**
- Add chat_instance_sid to Service

**Verify**
- Add `Locale` optional parameter on Verification creation.

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**Api**
- Add <Pay> Verb Transactions category to usage records

**Twiml**
- Add support for `Pay` verb

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**Api**
- Add `coaching` and `call_sid_to_coach` to participant properties, create and update requests.

**Authy**
- Set public library visibility, and added PII stanza
- Dropped support for `FactorType` param given new Factor prefixes **(breaking change)**
- Supported `DELETE` actions for Authy resources
- Move Authy Services resources to `authy` subdomain

**Autopilot**
- Introduce `autopilot` subdomain with all resources from `preview.understand`

**Preview**
- Renamed Understand intent to task **(breaking change)**
- Deprecated Authy endpoints from `preview` to `authy` subdomain

**Taskrouter**
- Allow TaskQueue ReservationActivitySid and AssignmentActivitySid to not be configured for MultiTask Workspaces

**Verify**
- Add `LookupEnabled` optional parameter on Service resource creation or update.
- Add `SendDigits` optional parameter on Verification creation.
- Add delete action on Service resourse.

**Twiml**
- Add custom parameters to TwiML `Client` noun and renamed the optional `name` field to `identity`. This is a breaking change in Ruby, and applications will need to transition from `dial.client ''` and `dial.client 'alice'` formats to `dial.client` and `dial.client(identity: alice)` formats. **(breaking change)**

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**Preview**
- Renamed response headers for Challenge and Factors Signatures

**Video**
- [Composer] Add Composition Hook resources

**Twiml**
- Add `debug` to `Gather`
- Add `participantIdentity` to `Room`

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**Api**
- Set `call_sid_to_coach` parameter in participant to be `preview`

**Preview**
- Supported `totp` in Authy preview endpoints
- Allowed `latest` in Authy Challenges endpoints

**Voice**
- changed path param name from parent_iso_code to iso_code for highrisk_special_prefixes api **(breaking change)**
- added geo permissions public api

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**Preview**
- Add `Form` resource to Authy preview given a `form_type`
- Add Authy initial api-definitions in the 4 main resources: Services, Entities, Factors, Challenges

**Pricing**
- add voice_numbers resource (v2)

**Verify**
- Move from preview to beta **(breaking change)**