diff --git a/crates/core/database/src/models/bots/model.rs b/crates/core/database/src/models/bots/model.rs
index 2a2ad0b5..85335590 100644
--- a/crates/core/database/src/models/bots/model.rs
+++ b/crates/core/database/src/models/bots/model.rs
@@ -49,6 +49,7 @@ auto_derived_partial!(
 
 auto_derived!(
     #[derive(Copy, Hash)]
+    #[serde(rename = "lowercase")]
     pub enum OAuth2Scope {
         Identify,
         Full,
diff --git a/crates/core/database/src/util/oauth2.rs b/crates/core/database/src/util/oauth2.rs
index ef09be01..79854116 100644
--- a/crates/core/database/src/util/oauth2.rs
+++ b/crates/core/database/src/util/oauth2.rs
@@ -123,4 +123,14 @@ pub async fn add_code_challange(token: &str, code_challenge: &str) -> Result<()>
     .map_err(|_| create_error!(InternalError))?;
 
     Ok(())
+}
+
+pub async fn get_code_challange(token: &str) -> Result<Option<String>> {
+    let mut conn = redis_kiss::get_connection()
+        .await
+        .map_err(|_| create_error!(InternalError))?;
+
+    conn.get(format!("oauth2:{token}:code_challenge"))
+        .await
+        .map_err(|_| create_error!(InternalError))
 }
\ No newline at end of file
diff --git a/crates/core/models/src/v0/oauth2.rs b/crates/core/models/src/v0/oauth2.rs
index c82715d4..0048a558 100644
--- a/crates/core/models/src/v0/oauth2.rs
+++ b/crates/core/models/src/v0/oauth2.rs
@@ -77,6 +77,7 @@ auto_derived!(
     }
 
     #[derive(Copy, Hash)]
+    #[cfg_attr(feature = "serde", serde(rename = "lowercase"))]
     pub enum OAuth2Scope {
         Identify,
         Full,
diff --git a/crates/delta/src/routes/bots/edit.rs b/crates/delta/src/routes/bots/edit.rs
index 845c7819..b606b6c2 100644
--- a/crates/delta/src/routes/bots/edit.rs
+++ b/crates/delta/src/routes/bots/edit.rs
@@ -1,4 +1,3 @@
-use revolt_database::BotOauth2;
 use revolt_database::{util::reference::Reference, Database, PartialBot, User};
 use revolt_models::v0::{self, DataEditBot};
 use revolt_result::{create_error, Result};
diff --git a/crates/delta/src/routes/oauth2/authorize_auth.rs b/crates/delta/src/routes/oauth2/authorize_auth.rs
index 682d6e35..e086f693 100644
--- a/crates/delta/src/routes/oauth2/authorize_auth.rs
+++ b/crates/delta/src/routes/oauth2/authorize_auth.rs
@@ -17,6 +17,10 @@ pub async fn auth(
     user: User,
     info: v0::OAuth2AuthorizationForm,
 ) -> Result<Json<v0::OAuth2AuthorizeAuthResponse>> {
+    if user.bot.is_some() {
+        return Err(create_error!(IsBot));
+    };
+
     let bot = Reference::from_unchecked(info.client_id.clone())
         .as_bot(db)
         .await?;
diff --git a/crates/delta/src/routes/oauth2/authorize_info.rs b/crates/delta/src/routes/oauth2/authorize_info.rs
index f1d7a91b..ccd5a55a 100644
--- a/crates/delta/src/routes/oauth2/authorize_info.rs
+++ b/crates/delta/src/routes/oauth2/authorize_info.rs
@@ -13,6 +13,10 @@ pub async fn info(
     user: User,
     info: v0::OAuth2AuthorizationForm,
 ) -> Result<Json<v0::OAuth2AuthorizeInfoResponse>> {
+    if user.bot.is_some() {
+        return Err(create_error!(IsBot));
+    };
+
     let bot = Reference::from_unchecked(info.client_id.to_string()).as_bot(db).await?;
     let bot_user = Reference::from_unchecked(bot.id.clone()).as_user(db).await?;
     let public_bot = bot.clone().into_public_bot(bot_user);
diff --git a/crates/delta/src/routes/oauth2/token.rs b/crates/delta/src/routes/oauth2/token.rs
index 84456ff0..14c93d6b 100644
--- a/crates/delta/src/routes/oauth2/token.rs
+++ b/crates/delta/src/routes/oauth2/token.rs
@@ -35,13 +35,9 @@ pub async fn token(
             return Err(create_error!(NotAuthenticated))
         }
     } else if let Some((code_verifier, method)) = info.code_verifier.as_ref().zip(claims.code_challange_method) {
-        let mut conn = redis_kiss::get_connection()
-            .await
-            .map_err(|_| create_error!(InternalError))?;
-
-        let server_code_challenge = conn.get::<_, String>(format!("oauth2:{}:code_challenge", &info.code))
-            .await
-            .map_err(|_| create_error!(InternalError))?;
+        let Some(server_code_challenge) = oauth2::get_code_challange(&info.code).await? else {
+            return Err(create_error!(NotAuthenticated))
+        };
 
         let is_valid = match method {
             v0::OAuth2CodeChallangeMethod::Plain => &server_code_challenge == code_verifier,
@@ -51,6 +47,8 @@ pub async fn token(
         if !is_valid {
             return Err(create_error!(NotAuthenticated))
         }
+    } else {
+        return Err(create_error!(NotAuthenticated))
     }
 
     if claims.client_id != info.client_id || claims.exp < Utc::now().timestamp() {
@@ -81,6 +79,7 @@ pub async fn token(
             }))
         },
         v0::OAuth2GrantType::Implicit => {
+            // token is already an access token so this endpoint does not need to be called - in theory this should be unreachable
             Err(create_error!(InvalidOperation))
         }
     }