Invitations:
	POST /v1/teams/{tid}/invitations
	{
	  "language": "en",
	  "senddate": 1660662724986,
	  "invitations": [
	    {
	      "email": "john@hotmail.com",
	      "user": "John"
	    }
	  ],
	  "role": "member",
	  "body": "Hello! Here's your invitation to join the wasabi team at Noysi."
	}


Notes:
	- You can send more than one invitation at once using the array field "invitations"
	- You can specify the role for the invitation in the field "role", if "guest" is set then you must also specify the group
	via its "cid"

	{
		  "language": "en",
		  "senddate": 1660662923185,
		  "invitations": [
		    {
		      "email": "john@gmail.com",
		      "user": "Johnny"
		    }
		  ],
		  "cid": "gac0kkide",
		  "role": "guest",
		  "body": "Hello! Here's your invitation to join the wasabi team at Noysi."
	}