Merge pull request #9361 from matrix-org/babolivier/third_party_validation

Remove unneeded type constraints on 3rd party protocol lookup responses

changelog.d/9361.bugfix

+Fix a bug causing Synapse to impose the wrong type constraints on fields when processing responses from appservices to `/_matrix/app/v1/thirdparty/user/{protocol}`.

synapse/appservice/api.py

@@ -76,9 +76,6 @@ def _is_valid_3pe_result(r, field):
     fields = r["fields"]
     if not isinstance(fields, dict):
         return False
-    for k in fields.keys():
-        if not isinstance(fields[k], str):
-            return False
 
     return True