Only create providers type in DB if it does not yet exist

Author: jefgodesky

migrations/002_create_accounts.sql

@@ -1,9 +1,16 @@
 CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
-CREATE TYPE provider AS ENUM ('google', 'discord', 'github');
+
+DO $$
+BEGIN
+    IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'PROVIDER') THEN
+        CREATE TYPE PROVIDER AS ENUM ('google', 'discord', 'github');
+    END IF;
+END
+$$ LANGUAGE plpgsql;
 
 CREATE TABLE IF NOT EXISTS accounts (
     id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
     uid UUID REFERENCES users (id) ON DELETE CASCADE,
-    provider provider,
+    provider PROVIDER,
     pid VARCHAR(255)
 );