How to change kibana's password complexity setting

Such as title, I need to improve the PASSWORD Complexity of the kibana user. my kibana is Basic license,if there have any method meet the need.

defalt setting just 6 characters:

@shawn_sun it doesn't look like there's a way to do this directly in Kibana but other verification methods may help. More info here - Password Policy Setting for users in kibana X-pack