1 files changed, 8 insertions, 2 deletions
diff --git a/src/invite/app.rs b/src/invite/app.rs
index 998b4f1..6800d72 100644
--- a/src/invite/app.rs
+++ b/src/invite/app.rs
@@ -4,7 +4,7 @@ use sqlx::sqlite::SqlitePool;
 use super::{repo::Provider as _, Id, Invite, Summary};
 use crate::{
     clock::DateTime,
-    db::NotFound as _,
+    db::{Duplicate as _, NotFound as _},
     event::repo::Provider as _,
     login::{repo::Provider as _, Login, Password},
     token::{repo::Provider as _, Secret},
@@ -68,7 +68,11 @@ impl<'a> Invites<'a> {
         // catch it.
         tx.invites().accept(&invite).await?;
         let created = tx.sequence().next(accepted_at).await?;
-        let login = tx.logins().create(name, &password_hash, &created).await?;
+        let login = tx
+            .logins()
+            .create(name, &password_hash, &created)
+            .await
+            .duplicate(|| AcceptError::DuplicateLogin(name.into()))?;
         let secret = tx.tokens().issue(&login, accepted_at).await?;
         tx.commit().await?;
 
@@ -99,6 +103,8 @@ pub enum Error {
 pub enum AcceptError {
     #[error("invite not found: {0}")]
     NotFound(Id),
+    #[error("name in use: {0}")]
+    DuplicateLogin(String),
     #[error(transparent)]
     Database(#[from] sqlx::Error),
     #[error(transparent)]