feat(cmedb): update get_credentials to use proper sqlalchemy syntax

cme/protocols/smb/database.py

@@ -696,24 +696,23 @@ class database:
         """
         # if we're returning a single credential by ID
         if self.is_credential_valid(filter_term):
-            results = self.conn.query(self.UsersTable).filter(
+            q = select(self.UsersTable).filter(
                 self.UsersTable.c.id == filter_term
-            ).all()
+            )
         elif cred_type:
-            results = self.conn.query(self.UsersTable).filter(
+            q = select(self.UsersTable).filter(
                 self.UsersTable.c.credtype == cred_type
-            ).all()
+            )
         # if we're filtering by username
         elif filter_term and filter_term != '':
-            results = self.conn.query(self.UsersTable).filter(
+            q = select(self.UsersTable).filter(
                 func.lower(self.UsersTable.c.username).like(func.lower(f"%{filter_term}%"))
-            ).all()
+            )
         # otherwise return all credentials
         else:
-            results = self.conn.query(self.UsersTable).all()
+            q = select(self.UsersTable)
 
-        self.conn.commit()
-        self.conn.close()
+        results = asyncio.run(self.conn.execute(q)).all()
         return results
 
     def is_user_valid(self, user_id):