diff --git a/src/constants.rs b/src/constants.rs
index 156aa8e..92e0d57 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -14,4 +14,10 @@ pub mod database_tables_names {
 
     /// User table
     pub const USERS_TABLE: &str = "utilisateurs";
-}
\ No newline at end of file
+}
+
+/// The account image to show for user who do not have any
+pub const DEFAULT_ACCOUNT_IMAGE: &str = "avatars/0Reverse.png";
+
+/// The account image to show for users who are not allowed to access other users account images
+pub const ERROR_ACCOUNT_IMAGE: &str = "avatars/0Red.png";
\ No newline at end of file
diff --git a/src/data/user.rs b/src/data/user.rs
index c3c411f..8024777 100644
--- a/src/data/user.rs
+++ b/src/data/user.rs
@@ -1,3 +1,5 @@
+use crate::utils::user_data_utils::user_data_url;
+
 ///! User information
 ///!
 ///! @author Pierre Hubert
@@ -30,4 +32,18 @@ pub struct User {
     pub virtual_directory: Option<String>,
     pub account_image_path: Option<String>,
     pub account_image_visibility: AccountImageVisibility,
+}
+
+impl User {
+
+    /// Get the URL pointing to the default account image
+    pub fn default_account_image_url() -> String {
+        user_data_url(crate::constants::DEFAULT_ACCOUNT_IMAGE)
+    }
+
+    /// Get the URL pointing to the error account image, when the user is not allowed to see user
+    /// account image
+    pub fn error_account_image_url() -> String {
+        user_data_url(crate::constants::ERROR_ACCOUNT_IMAGE)
+    }
 }
\ No newline at end of file
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
index 632812e..ab27a0d 100644
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -2,4 +2,5 @@
 //!
 //! This module contains utilities that can be used anywhere in the code
 
-pub mod crypt_utils;
\ No newline at end of file
+pub mod crypt_utils;
+pub mod user_data_utils;
\ No newline at end of file
diff --git a/src/utils/user_data_utils.rs b/src/utils/user_data_utils.rs
new file mode 100644
index 0000000..a262d4a
--- /dev/null
+++ b/src/utils/user_data_utils.rs
@@ -0,0 +1,12 @@
+//! # User data utilities
+//!
+//! @author Pierre Hubert
+
+use crate::data::config::conf;
+
+/// Get the full URL to a user data file
+///
+/// `uri` should contain the path to the target resource
+pub fn user_data_url(uri: &str) -> String {
+    format!("{}{}", conf().storage_url, uri)
+}
\ No newline at end of file