Option A
X account
Under Social Media Links, select X and enter your complete X profile URL.

Use either your Gmail address or X account. The same contact must be published on the game's Steam store page.
Open the app in Steamworks and select Edit Store Page.

Select the Basic Info tab.

You may add X, Gmail, or both.
Under Social Media Links, select X and enter your complete X profile URL.

Under Support Contact Info, enter the Gmail address you will use to sign in to Steamy NSFW.

Select Save at the bottom of the page.

Return to the top of the editor and select Publish.

Select Publish to public so Steam exposes the updated contact.

Sign in with the published Gmail or X account, then enter the game's Steam App ID under Developer verification.