✨ Add get one user route

app/main.py

@@ -305,3 +305,19 @@ async def search_users(name: str, current_user: User = Depends(get_current_user)
         raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail="Regex may be wrongly formatted")
     
     return users
+
+@app.get(
+    path="/user/{id}",
+    responses={401: {"model": HTTPError}, 422: {"model": HTTPError}, 404: {"model": HTTPError}},
+    response_model=UserDTO
+)
+async def get_user(id: str, current_user: User = Depends(get_current_user)):
+    try:
+        user = users_collection.find_one({"_id": ObjectId(id)})
+    except bson.errors.InvalidId:
+        objectid_misformatted()
+    
+    if user is None:
+        raise HTTPException(status_code=404, detail="User not found")
+    
+    return serializers.user_serialize(user)