Fix bad redirection URL

src/data/provider.rs

@@ -49,7 +49,7 @@ impl Provider {
     /// Get the URL to use to login with the provider
     pub fn login_url(&self, redirect_url: &LoginRedirect) -> String {
         format!(
-            "/login_with_prov?id={}&redirect_url={}",
+            "/login_with_prov?id={}&redirect={}",
             self.id_encoded(),
             redirect_url.get_encoded()
         )