src/vs/platform/userDataSync/common/userDataSyncAccount.ts/UserDataSyncAccountService/updateAccount
class UserDataSyncAccountService:	async updateAccount(account: IUserDataSyncAccount | undefined): Promise<void> {
		if (account && this._account ? account.token !== this._account.token || account.authenticationProviderId !== this._account.authenticationProviderId : account !== this._account) {
			this._account = account;
			if (this._account) {
				this.userDataSyncStoreService.setAuthToken(this._account.token, this._account.authenticationProviderId);
			}
			this._onDidChangeAccount.fire(account);
		}
	}