rework superuser api

data/database.py

@@ -12,6 +12,7 @@ from random import SystemRandom
 import resumablehashlib
 import toposort
 
+from enum import Enum
 from peewee import *
 from sqlalchemy.engine.url import make_url
 
@@ -869,6 +870,9 @@ class TorrentInfo(BaseModel):
     )
 
 
+class ServiceKeyApprovalType(Enum):
+  SUPERUSER = 'Super User API'
+
 _ServiceKeyApproverProxy = Proxy()
 class ServiceKeyApproval(BaseModel):
   approver = ForeignKeyField(_ServiceKeyApproverProxy, null=True)