Auto Login lacks service account functionality
As the title states, the Auto Login plugin does not have the ability to handle a login with multiple service accounts.
Add feature to include service accounts.
I'm not overly familiar with how the service account system works. I don't have one, so I can't test this. I do have two separate XIV accounts that aren't tied to the same email - Is it possible to combine them into one service account? If not, do I need to pay another sub to add another service account to my existing one?
Everyone has the default Service Account 1 attached to their Square Enix Account. You can register up to 8 Service Accounts per Square Enix Account. When you log in and, for example, go to the Data Center screen and select a Data Center, if you have more than one Service Account attached to your Square Enix Account, you will get a prompt for which one you would like to use. This is where the plugin breaks as it does not handle the Service Account selection box.
Important note, the game saves the last logged in characters service account as the "default" to use if you simply click the "Start" button. You only get the Service Account prompt when selecting a Data Center.
1 email/login/square enix account can host up to 8 FF accounts, meaning 1 login can service 2 playable characters at once (you still pay for each service account, register games/expansions to it, etc. it just means if you want to multibox, you don't need to juggle multiple emails/logins.)
When the Datacenter option is pressed on the main page, it will always ask you to select a service account (if you have more than one). I'm also having this issue.
You can add a new service account to your existing account by going to https://secure.square-enix.com/account/app/svc/mogstation and then clicking Add New Service Account on the left.
Although fair warning @Aida-Enna please test this on a test account. You can NEVER delete a Service Account once it has been registered. So you will get this forever. Square Enix will NOT delete additional Service Accounts.
For now as a workaround you can use Yes Already to select your service account.