Changes to Look up visible shared player links

added the pattern ^\d{1,20}$ to the request property discord_ids/items

api operation id sharedLinksLookup was added

removed the non-success response with the status 400

removed the non-success response with the status 401

removed the non-success response with the status 429

removed the non-success response with the status 503

the response property items became required for the status 200

the response property items/items/is_verified became required for the status 200

the response property items/items/player_tag became required for the status 200

the response property items/items/user_id became required for the status 200

the items/items/user_id response's property pattern ^\d{1,20}$ was added for the status 200