Check for duplicate email

geneit_backend/src/services/users_service.rs

@@ -20,3 +20,15 @@ pub async fn create_account(name: &str, email: &str) -> anyhow::Result<User> {
         Ok(res)
     })
 }
+
+/// Check if an email address is already associated with an account
+pub async fn exists_email(email: &str) -> anyhow::Result<bool> {
+    db_connection::execute(|conn| {
+        let count: i64 = users::table
+            .filter(users::email.eq(email))
+            .count()
+            .get_result(conn)?;
+
+        Ok(count != 0)
+    })
+}