Merge and modify PR from @Kurnihil

Merging a PR from @Kurnihil into the already rebased branch.
Made some small changes to make it work with newer changes.

Some finetuning is probably still needed.

Co-authored-by: Daniele Andrei <daniele.andrei@geo-satis.com>
Co-authored-by: Kurnihil

src/db/models/organization.rs

@@ -510,7 +510,7 @@ impl UserOrganization {
                             .set(UserOrganizationDb::to_db(self))
                             .execute(conn)
                             .map_res("Error adding user to organization")
-                    }
+                    },
                     Err(e) => Err(e.into()),
                 }.map_res("Error adding user to organization")
             }