Synapse is not spec compliant when using OAuth 2.0 API for POST /_matrix/client/v3/devices and DELETE /_matrix/client/v3/devices/{deviceId} and POST /_matrix/client/v3/account/deactivate endpoints

Synapse is not spec compliant when using OAuth 2.0 API for POST /_matrix/client/v3/devices and DELETE /_matrix/client/v3/devices/{deviceId} and POST /_matrix/client/v3/account/deactivate endpoints #5826