fn assert_account_data_owner(
sender_user: &UserId,
user_id: &UserId,
appservice_info: Option<&RegistrationInfo>,
message: &str,
) -> Resultfn assert_account_data_owner(
sender_user: &UserId,
user_id: &UserId,
appservice_info: Option<&RegistrationInfo>,
message: &str,
) -> Result