create_account_async
Description:
Start an asynchronous operation to create the account this on the account manager.
callback will only be called when the newly created Account
has the TP_ACCOUNT_FEATURE_CORE feature ready on it, so when calling create_account_async.end, one can
guarantee this feature.
Parameters:
| this | |
| callback |
a function to call when the account has been created |
| user_data |
user data to |