How i will get these id value in comma separated form [closed]

when i print my query it return this

array:4 [▼ "name" => "श्री विनोद कुमार", "contactmobile" => "11111111", "userid" => "JE20", "colonyid" => "8, 20, 21" ] 

but i want to show like this

array:4 [▼ "name" => "श्री विनोद कुमार", "contactmobile" => "11111111", "userid" => "JE20", "colonyid" => "lko, ndls, mumbai" ]

my query is

User::select('users.name','users.contactmobile','user_colonies.userid','user_colonies.colonyid')
    ->join('user_colonies','users.userid','=','user_colonies.userid')
    ->get();

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