* `account_field_name_length`: An account field name maximum length (default: `512`).
* `account_field_value_length`: An account field value maximum length (default: `2048`).
* `external_user_synchronization`: Enabling following/followers counters synchronization for external users.
* `account_field_name_length`: An account field name maximum length (default: `512`).
* `account_field_value_length`: An account field value maximum length (default: `2048`).
* `external_user_synchronization`: Enabling following/followers counters synchronization for external users.