Converted the Api to a Restful api.

gamenight-cli/src/flows/join.rs

@@ -1,7 +1,7 @@
 use std::fmt::Display;
 
 use async_trait::async_trait;
-use gamenight_api_client_rs::models::GamenightId;
+use gamenight_api_client_rs::models::UserId;
 use uuid::Uuid;
 
 use super::{Flow, FlowOutcome, FlowResult, GamenightState};
@@ -22,7 +22,7 @@ impl Join {
 #[async_trait]
 impl<'a> Flow<'a> for Join {
     async fn run(&self, state: &'a mut GamenightState) -> FlowResult<'a> {
-        let _ = state.api.join_post(Some(GamenightId{gamenight_id: self.gamenight_id.to_string()})).await?;
+        let _ = state.api.post_gamenight_participants(&self.gamenight_id.to_string(), Some(UserId{user_id: state.get_user_id()?.to_string()})).await?;
 
         clear_screen::clear();
         Ok((FlowOutcome::Successful, state))