Calls initConnection and authorizes the client with one of the following:

• Bot token (string)
• Exported authorization (types.AuthExportedAuthorization)
• User authorization handlers (AuthorizeUserParams)

if the current auth key doesn't throw AUTH_KEY_UNREGISTERED when calling updates.getState.

Notes:

1. Requires the apiId and apiHash paramters to be passed when constructing the client.
2. Reconnects the client to the appropriate DC in case of MIGRATE_X errors.
3. The parameters passed to the initConnection call can be configured with the last parameter of the constructor.