RegisterRequest
begin the account registration process by requesting a phone number verification code. when the code is received, submit it with a verify request
This type can contain the following fields:
| field | type | info | 
|---|---|---|
| account | String | the e164 phone number to register with | 
| captcha | String | See https://signald.org/articles/captcha/ | 
| server | String | The identifier of the server to use. Leave blank for default (usually Signal production servers but configurable at build time) | 
| voice | boolean | set to true to request a voice call instead of an SMS for verification |