(feat) Users can now be created.

Having issues with fetching users; switch to sqlx?

Signed-off-by: Louis Hollingworth <louis@hollingworth.nl>

migrations/2023-10-15-172140_create_users/up.sql

@@ -12,6 +12,7 @@ CREATE TABLE users (
     pass VARCHAR NOT NULL,
     created_at TIMESTAMP NOT NULL DEFAULT NOW(),
     updated_at TIMESTAMP NOT NULL DEFAULT NOW(),
-    main_fedi TEXT
+    main_fedi TEXT,
+    UNIQUE(username, epost)
 );
 SELECT diesel_manage_updated_at('users');