Servers: Add route for fetching members.

src/database/entities/user.rs

@@ -184,6 +184,7 @@ impl User {
     }
 
     /// Utility function for fetching multiple users from the perspective of one.
+    /// Assumes user has a mutual connection with others.
     pub async fn fetch_multiple_users(&self, user_ids: Vec<String>) -> Result<Vec<User>> {
         let mut users = vec![];
         let mut cursor = get_collection("users")