Can stop streaming

src/data/call_signal.rs

@@ -48,6 +48,12 @@ pub struct UserCallOfferRequest {
     pub user_id: UserID,
 }
 
+/// Close call stream
+pub struct CloseCallStream {
+    pub call_hash: String,
+    pub peer_id: Option<UserID>,
+}
+
 impl SdpType {
     pub fn from_str(val: &str) -> Res<SdpType> {
         match val {