=== Users Table Structure ===

id - varchar(255) - NO - PRI
username - varchar(255) - NO - UNI
email - varchar(255) - NO - UNI
password_hash - varchar(255) - YES - 
role_id - varchar(255) - NO - MUL
is_active - tinyint(1) - YES - MUL
created_at - timestamp - NO - 
updated_at - timestamp - NO - 

✓ password_hash column already exists