Fix #747 by updating async SQLAlchemy OAuth example code (#748)

Author: ntarora

examples/sqlalchemy/async_oauth_app.py

@@ -63,11 +63,17 @@ async def async_save(self, installation: Installation):
                 b["client_id"] = self.client_id
                 await database.execute(self.bots.insert(), b)
 
-    async def async_find_bot(self, *, enterprise_id: Optional[str], team_id: Optional[str]) -> Optional[Bot]:
+    async def async_find_bot(
+        self, *, enterprise_id: Optional[str], team_id: Optional[str], is_enterprise_install: Optional[bool]
+    ) -> Optional[Bot]:
         c = self.bots.c
         query = (
             self.bots.select()
-            .where(and_(c.enterprise_id == enterprise_id, c.team_id == team_id))
+            .where(
+                and_(
+                    c.enterprise_id == enterprise_id, c.team_id == team_id, c.is_enterprise_install == is_enterprise_install
+                )
+            )
             .order_by(desc(c.installed_at))
             .limit(1)
         )