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-rw-r--r--synapse/storage/registration.py7
1 files changed, 5 insertions, 2 deletions
diff --git a/synapse/storage/registration.py b/synapse/storage/registration.py
index 25adecaf6d..586628579d 100644
--- a/synapse/storage/registration.py
+++ b/synapse/storage/registration.py
@@ -99,13 +99,16 @@ class RegistrationStore(SQLBaseStore):
         )
 
     def get_users_by_id_case_insensitive(self, user_id):
+        """Gets users that match user_id case insensitively.
+        Returns a mapping of user_id -> password_hash.
+        """
         def f(txn):
             sql = (
                 "SELECT name, password_hash FROM users"
-                " WHERE name = lower(?)"
+                " WHERE lower(name) = lower(?)"
             )
             txn.execute(sql, (user_id,))
-            return self.cursor_to_dict(txn)
+            return dict(txn.fetchall())
 
         return self.runInteraction("get_users_by_id_case_insensitive", f)