Converted the Api to a Restful api.

backend-actix/src/request/gamenight_participant.rs

@@ -0,0 +1,28 @@
+use actix_web::{delete, web, HttpResponse, Responder};
+use gamenight_database::{DbPool, GetConnection};
+use gamenight_database::gamenight_participants::GamenightParticipant;
+use uuid::Uuid;
+use crate::request::authorization::AuthUser;
+use crate::request::error::ApiError;
+
+#[delete("/gamenight/{gamenightId}/participant/{userId}")]
+pub async fn delete_gamenight_participant(
+    pool: web::Data<DbPool>,
+    _user: AuthUser,
+    gamenight_id: web::Path<Uuid>,
+    user_id: web::Path<Uuid>
+) -> Result<impl Responder, ApiError> {
+    web::block(move || -> Result<usize, ApiError> {
+        let mut conn = pool.get_conn();
+        let participant = GamenightParticipant {
+            gamenight_id: gamenight_id.into_inner(),
+            user_id: user_id.into_inner(),
+        };
+        let x = gamenight_database::gamenight_participants::delete_gamenight_participant(&mut conn, participant)?;
+
+        Ok(x)
+    })
+        .await??;
+
+    Ok(HttpResponse::Ok())
+}