Changes to Update account settings

added the new optional request property hiddenReason

added the new optional header request parameter X-Shield-Shiba-Token

added the non-success response with the status 503

added the new optional request property nameEffect

added the new optional request property themeColor

the request property hidden became nullable

the request property language became nullable

the request property hidden became optional

the request property language became optional

the request property vanity became optional

added the non-success response with the status 403