diff --git a/src/domain/user/token.rs b/src/domain/user/token.rs
index 2ad6619..c62e517 100644
--- a/src/domain/user/token.rs
+++ b/src/domain/user/token.rs
@@ -1,15 +1,15 @@
 use chrono::NaiveDateTime;
 use serde::{Serialize, Deserialize};
 
-pub const AUTH_TOKEN_EXPIRATION_TIME_IN_DAYS:i32 = 1;
-pub const REFRESH_TOKEN_EXPIRATION_TIME_IN_DAYS: i32 = 20;
+pub const AUTH_TOKEN_EXPIRATION_TIME_IN_DAYS:u32 = 1;
+pub const REFRESH_TOKEN_EXPIRATION_TIME_IN_DAYS: u32 = 20;
 
 #[derive(Serialize, Deserialize, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord)]
 pub struct Token {
     #[serde(skip_serializing, skip_deserializing)]
-    pub id: i32,
+    pub id: u32,
     #[serde(rename = "userId")]
-    pub user_id: i32,
+    pub user_id: u32,
     #[serde(skip_serializing, skip_deserializing)]
     pub time_created: Option<NaiveDateTime>,
     #[serde(skip_serializing, skip_deserializing)]
@@ -21,7 +21,7 @@ pub struct Token {
 }
 
 impl Token{
-    pub fn new(user_id: i32, auth_token: String, refresh_token: String) -> Token{
+    pub fn new(user_id: u32, auth_token: String, refresh_token: String) -> Token{
         Token { 
             id: 0,
             user_id,
diff --git a/src/domain/user/user.rs b/src/domain/user/user.rs
index 48ac15d..a1b0928 100644
--- a/src/domain/user/user.rs
+++ b/src/domain/user/user.rs
@@ -4,8 +4,8 @@ use serde::{Serialize, Deserialize};
 use crate::dtos::user::user_dtos::UserForCreationDto;
 
 #[derive(Serialize, Deserialize, Debug, Default, Clone, PartialEq, Eq, PartialOrd, Ord)]
-pub struct User{
-    pub id: i32,
+pub struct User {
+    pub id: u32,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub time_created: Option<NaiveDateTime>,
     #[serde(skip_serializing_if = "Option::is_none")]