Return first element in array_agg()

It was actually a mistake from my part… the answer to my first question lies in that query itself. I just have to enclose the (array_agg(team_name))[1], earlier I tried it without the brackets.

SELECT team_id, (array_agg(team_name))[1] AS teamname,
     array_agg(player_id||'##'||player_name) AS playerdetails
FROM team
INNER JOIN players ON team_id = player_team
GROUP BY team_id