Is your feature request related to a problem? Please describe.
Yes, Currently we are hitting the depreciation warning in hvac 0.11 since the kv property is depreciated and adviced to use from Client.secrets

Clear Warning:
DeprecationWarning: Call to deprecated property 'kv'. This property will be removed in version '0.9.0' Please use the 'kv' property on the 'Client.secrets' attribute moving forward

Describe the solution you'd like
Remove the usage of kv property directly in dynaconf and use if from Client.secrets

Describe alternatives you've considered
The alternative is not required.