fix: display name is optional

crates/core/database/src/models/users/model.rs

@@ -16,7 +16,8 @@ auto_derived_partial!(
         /// Discriminator
         pub discriminator: String,
         /// Display name
-        pub display_name: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub display_name: Option<String>,
         #[serde(skip_serializing_if = "Option::is_none")]
         /// Avatar attachment
         pub avatar: Option<File>,

crates/core/models/src/v0/users.rs

@@ -11,7 +11,8 @@ auto_derived!(
         /// Discriminator
         pub discriminator: String,
         /// Display name
-        pub display_name: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub display_name: Option<String>,
         #[serde(skip_serializing_if = "Option::is_none")]
         /// Avatar attachment
         pub avatar: Option<File>,

crates/quark/src/models/users/user.rs

@@ -131,7 +131,8 @@ pub struct User {
     /// Discriminator
     pub discriminator: String,
     /// Display name
-    pub display_name: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub display_name: Option<String>,
     #[serde(skip_serializing_if = "Option::is_none")]
     /// Avatar attachment
     pub avatar: Option<File>,