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

migrations/postgresql/2023-06-02-200424_create_organization_api_key/up.sql

@@ -0,0 +1,10 @@
+CREATE TABLE organization_api_key (
+	uuid			CHAR(36) NOT NULL,
+	org_uuid		CHAR(36) NOT NULL REFERENCES organizations(uuid),
+	atype			INTEGER NOT NULL,
+	api_key			VARCHAR(255),
+	revision_date	TIMESTAMP NOT NULL,
+	PRIMARY KEY(uuid, org_uuid)
+);
+
+ALTER TABLE users ADD COLUMN external_id TEXT;