Refactor tags services and added tests

Implemented some functionality which will allow the service
configuration of the app to be split among the features for readability
and testability.

src/auth.rs

@@ -1,4 +1,3 @@
-use std::sync::Mutex;
 use actix_web::Responder;
 use actix_web::{
     web::{self, Json},
@@ -7,6 +6,7 @@ use actix_web::{
 use chrono::{Duration, Utc};
 use jsonwebtoken::{encode, EncodingKey, Header};
 use log::{debug, error};
+use std::sync::Mutex;
 
 use crate::{
     data::{secret_key, Claims, CreateAccountRequest, LoginRequest, Token},
@@ -32,7 +32,10 @@ async fn register<D: UserDao>(
     }
 }
 
-pub async fn login<D: UserDao>(creds: Json<LoginRequest>, user_dao: web::Data<Mutex<D>>) -> HttpResponse {
+pub async fn login<D: UserDao>(
+    creds: Json<LoginRequest>,
+    user_dao: web::Data<Mutex<D>>,
+) -> HttpResponse {
     debug!("Logging in: {}", creds.username);
 
     let mut user_dao = user_dao.lock().expect("Unable to get UserDao");