How to make a call on a discord server

I want to make calls in voice channel in a server so i don't have to make so many DM's. It would be so convenient and choose to select people to call in a voice channel. It would great to call someone instead of waiting for someone to join. Discord on Xbox uses voice channel and it would be great to call friends to join on there too. If too many people call in a server then you could make it so only the owner or a select few can make a call on a discord server. Plus people max limit in group chats added to 25 and said it's temporary so having this feature on a server may save resources on group chats. Since a server sometimes has a 1000 people you can send a request to the people you want to allow calls from you and they can accept it.