Add routes for organisations

+ FIX: Change eventId type

src/app.ts

@@ -4,6 +4,7 @@ import eventRouter from "./Routes/event.routes";
 import adminAuthRouter from "./Routes/admin_auth.routes";
 import argon2 from "argon2";
 import adminRouter from "./Routes/admin.routes";
+import organisationRouter from "./Routes/organisation.routes";
 
 require("dotenv").config(); // Load dotenv config
 
@@ -46,6 +47,8 @@ async function main() {
 
   app.use("/api/admins", adminRouter);
 
+  app.use("/api/organisations", organisationRouter);
+
   app.listen(process.env.PORT, () => {
     console.log(`Listening on Port: ${process.env.PORT}`);
   });