feat(users): implement fetch self / user, open dm

src/routes/users/change_username.rs

@@ -1,25 +1,26 @@
-use revolt_quark::{EmptyResponse, Result};
+use revolt_quark::{Error, EmptyResponse, Result, models::User, Database};
 use crate::util::regex::RE_USERNAME;
 use mongodb::bson::doc;
 use rauth::entities::Account;
-use rocket::serde::json::Json;
+use rocket::{serde::json::Json, State};
 use serde::{Deserialize, Serialize};
 use validator::Validate;
 
 #[derive(Validate, Serialize, Deserialize)]
 pub struct Data {
     #[validate(length(min = 2, max = 32), regex = "RE_USERNAME")]
-    username: Option<String>,
+    username: String,
     #[validate(length(min = 8, max = 1024))]
     password: String,
 }
 
-#[patch("/<_ignore_id>/username", data = "<data>")]
+#[patch("/@me/username", data = "<data>")]
 pub async fn req(
+    db: &State<Database>,
     account: Account,
-    //user: UserRef,
+    user: User,
     data: Json<Data>,
-    _ignore_id: String,
 ) -> Result<EmptyResponse> {
-    todo!()
+    account.verify_password(&data.password).map_err(|_| Error::InvalidCredentials)?;
+    user.update_username(db, &data.username).await
 }